← SoftBank overview

SoftBank vs KDDI: why the prices moved differently

Weekly · monthly · quarterly news summaries, side by side in time

SoftBank Corp. (9434.JP)

Q3 2026
▲2▼2

SoftBank Corp. advances on AI and fintech, but infrastructure and cyber risks weigh

  • AI and fintech expansion SoftBank deepened its Seven & i/PayPay alliance with a ¥100bn investment, moved closer to acquiring SP.LINKS for $625m, and won Digital Agency adoption for its Sarashina AI, boosting growth prospects.

    These strategic moves are key positive drivers for the quarter.

  • New technology initiatives SoftBank joined Nvidia's Cosmos Coalition and tested stratospheric and drone communications, signaling innovation in next-generation connectivity that could open new revenue streams.

    These initiatives highlight forward-looking technology bets.

  • Infrastructure and cyber setbacks Oracle's force majeure notice on the Stargate data center hit shares ~6%, a ransomware attack on subsidiary IDC Frontier exposed data and disrupted hundreds of customers, and the Kumamoto earthquake caused network outages.

    These operational risks negatively impacted the stock and reputation.

  • Dilution risk from Seven & i share issuance The Seven & i share issuance carries potential EPS and ROE dilution, which could pressure the stock if earnings don't grow enough to offset the increased share count.

    This is a financial risk that may weigh on investor sentiment.

September 2026
▲2▼2

SoftBank Corp. advances stratospheric and drone tech, but AI data-center risk and a cyberattack weigh

  • Stratospheric and drone communications breakthroughs SoftBank's partners Sceye and General Atomics completed successful tests of high-altitude platforms and drone-mounted communications pods that can restore mobile service from the sky. These show SoftBank's technology is moving toward commercial use, opening new revenue opportunities beyond ground-based networks.

    Two separate successful flight tests this period demonstrate real progress in SoftBank's next-generation connectivity business.

  • Oracle's force majeure notice on Stargate data center Oracle warned it may delay payments if the huge Project Jupiter data center (part of the Stargate AI buildout with SoftBank) misses its 2028 opening. SoftBank shares fell about 6% as investors worried about the AI infrastructure project's timeline and SoftBank's exposure to it.

    This is the single biggest negative price driver this period, directly hitting SoftBank shares.

  • Expanding smart-glasses lineup in Japan SoftBank launched Ray-Ban Meta Gen 3 and Meta Glasses by LISA in Japan, building on earlier Meta glasses sales. As the carrier partner, SoftBank adds a new consumer product category that could boost subscriber engagement and device revenue.

    A concrete product launch that expands SoftBank's retail offering and ties it to Meta's AI wearables push.

  • Ransomware attack on SoftBank subsidiary IDC Frontier A ransomware attack on SoftBank's cloud unit IDC Frontier exposed data and disrupted services for hundreds of companies and local governments, including JR East's 2 million members. This raises regulatory and reputational risk, and could lead to fines or customer losses.

    A major security breach at a SoftBank subsidiary creates regulatory and trust risks that can pressure the stock.

Latest
▲2▼2

SoftBank Corp. advances stratospheric and drone tech, but AI data-center risk and a cyberattack weigh

  • Stratospheric and drone communications breakthroughs SoftBank's partners Sceye and General Atomics completed successful tests of high-altitude platforms and drone-mounted communications pods that can restore mobile service from the sky. These show SoftBank's technology is moving toward commercial use, opening new revenue opportunities beyond ground-based networks.

    Two separate successful flight tests this period demonstrate real progress in SoftBank's next-generation connectivity business.

  • Oracle's force majeure notice on Stargate data center Oracle warned it may delay payments if the huge Project Jupiter data center (part of the Stargate AI buildout with SoftBank) misses its 2028 opening. SoftBank shares fell about 6% as investors worried about the AI infrastructure project's timeline and SoftBank's exposure to it.

    This is the single biggest negative price driver this period, directly hitting SoftBank shares.

  • Expanding smart-glasses lineup in Japan SoftBank launched Ray-Ban Meta Gen 3 and Meta Glasses by LISA in Japan, building on earlier Meta glasses sales. As the carrier partner, SoftBank adds a new consumer product category that could boost subscriber engagement and device revenue.

    A concrete product launch that expands SoftBank's retail offering and ties it to Meta's AI wearables push.

  • Ransomware attack on SoftBank subsidiary IDC Frontier A ransomware attack on SoftBank's cloud unit IDC Frontier exposed data and disrupted services for hundreds of companies and local governments, including JR East's 2 million members. This raises regulatory and reputational risk, and could lead to fines or customer losses.

    A major security breach at a SoftBank subsidiary creates regulatory and trust risks that can pressure the stock.

August 2026
▲3▼1

SoftBank's PayPay and Seven & i alliance reshapes fintech growth

  • PayPay–Seven & i capital alliance PayPay, with SoftBank's backing, formed a capital and business alliance with Seven & i to link digital payments with 22,000 convenience stores. This expands SoftBank's fintech reach and customer data, supporting long-term growth.

    This is the core new event that directly boosts SoftBank's fintech ecosystem and future earnings potential.

  • SoftBank invests ¥100 billion in Seven & i SoftBank invested ¥100 billion in Seven & i as part of a ¥300 billion total from SoftBank, PayPay, and Sumitomo Mitsui Card. This deepens ties and aims to accelerate convenience store reforms using AI and robots.

    This confirms the financial commitment and strategic integration, strengthening SoftBank's position in retail tech.

  • SoftBank nears acquisition of SP.LINKS SoftBank is close to buying payments firm SP.LINKS for about $625 million, making it a wholly owned subsidiary. This adds payment processing capabilities and scale to SoftBank's fintech operations.

    This is a new acquisition that expands SoftBank's payments business and could drive future revenue.

  • Kumamoto earthquake disrupts network A strong earthquake in Kumamoto caused communication service disruptions for SoftBank and other carriers. This may lead to repair costs and customer dissatisfaction, but the impact is likely temporary.

    This is a new operational risk that could weigh on short-term performance and reputation.

▲3▼1

SoftBank's PayPay and Seven & i alliance reshapes fintech growth

  • PayPay–Seven & i capital alliance PayPay, with SoftBank's backing, formed a capital and business alliance with Seven & i to link digital payments with 22,000 convenience stores. This expands SoftBank's fintech reach and customer data, supporting long-term growth.

    This is the core new event that directly boosts SoftBank's fintech ecosystem and future earnings potential.

  • SoftBank invests ¥100 billion in Seven & i SoftBank invested ¥100 billion in Seven & i as part of a ¥300 billion total from SoftBank, PayPay, and Sumitomo Mitsui Card. This deepens ties and aims to accelerate convenience store reforms using AI and robots.

    This confirms the financial commitment and strategic integration, strengthening SoftBank's position in retail tech.

  • SoftBank nears acquisition of SP.LINKS SoftBank is close to buying payments firm SP.LINKS for about $625 million, making it a wholly owned subsidiary. This adds payment processing capabilities and scale to SoftBank's fintech operations.

    This is a new acquisition that expands SoftBank's payments business and could drive future revenue.

  • Kumamoto earthquake disrupts network A strong earthquake in Kumamoto caused communication service disruptions for SoftBank and other carriers. This may lead to repair costs and customer dissatisfaction, but the impact is likely temporary.

    This is a new operational risk that could weigh on short-term performance and reputation.

July 2026
▲3

SoftBank Corp. bets on AI, payments and 7-Eleven tie-up

  • SoftBank and PayPay plan multi-trillion-yen investment in Seven & i SoftBank Corp. and PayPay are in talks to invest several trillion yen in Seven & i, owner of 7-Eleven. This would plug PayPay rewards and SoftBank's mobile customers into Japan's biggest convenience-store network, lifting store visits and spending. Talks are still fluid and could fall apart.

    This is the single biggest new force behind the stock, tying SoftBank's payments and mobile businesses to a huge retail network.

  • 7-Eleven parent weighs stake sale, with dilution risk Seven & i may issue several hundred billion yen in new shares to SoftBank, PayPay and Sumitomo Mitsui, aiming for a deal this summer. The tie-up could cut costs and add AI logistics, but new shares dilute earnings per share and return on equity unless growth offsets it.

    It shows the real counterweight: the deal could help or hurt SoftBank's per-share earnings depending on execution.

  • SoftBank's SB Intuitions AI models adopted by Japan's Digital Agency SoftBank's SB Intuitions trained its Sarashina generative AI models using Nvidia's Nemotron, and Sarashina3 mini was picked by Japan's Digital Agency. This shows SoftBank's AI work is winning real government customers, supporting its push beyond plain telecom.

    It is new evidence that SoftBank's AI investment is producing sellable products and public-sector demand.

  • SoftBank joins Nvidia's Cosmos Coalition for physical AI SoftBank Corp. intends to join Nvidia's Cosmos Coalition to help build open physical AI models for robots and machines, alongside FANUC, Sony and others. This positions SoftBank inside Japan's robotics and automation supply chain, a potential new growth area.

    It is a fresh strategic commitment that could open new business lines beyond telecom and payments.

▲3

SoftBank Corp. bets on AI, payments and 7-Eleven tie-up

  • SoftBank and PayPay plan multi-trillion-yen investment in Seven & i SoftBank Corp. and PayPay are in talks to invest several trillion yen in Seven & i, owner of 7-Eleven. This would plug PayPay rewards and SoftBank's mobile customers into Japan's biggest convenience-store network, lifting store visits and spending. Talks are still fluid and could fall apart.

    This is the single biggest new force behind the stock, tying SoftBank's payments and mobile businesses to a huge retail network.

  • 7-Eleven parent weighs stake sale, with dilution risk Seven & i may issue several hundred billion yen in new shares to SoftBank, PayPay and Sumitomo Mitsui, aiming for a deal this summer. The tie-up could cut costs and add AI logistics, but new shares dilute earnings per share and return on equity unless growth offsets it.

    It shows the real counterweight: the deal could help or hurt SoftBank's per-share earnings depending on execution.

  • SoftBank's SB Intuitions AI models adopted by Japan's Digital Agency SoftBank's SB Intuitions trained its Sarashina generative AI models using Nvidia's Nemotron, and Sarashina3 mini was picked by Japan's Digital Agency. This shows SoftBank's AI work is winning real government customers, supporting its push beyond plain telecom.

    It is new evidence that SoftBank's AI investment is producing sellable products and public-sector demand.

  • SoftBank joins Nvidia's Cosmos Coalition for physical AI SoftBank Corp. intends to join Nvidia's Cosmos Coalition to help build open physical AI models for robots and machines, alongside FANUC, Sony and others. This positions SoftBank inside Japan's robotics and automation supply chain, a potential new growth area.

    It is a fresh strategic commitment that could open new business lines beyond telecom and payments.

KDDI Corporation (9433.JP)

Q3 2026
▲2▼2

KDDI expands services but faces major data breach and quake hit

  • Connected-car and stablecoin expansion KDDI deepened connected-car ties with BMW via Verizon and piloted Japan's first in-store stablecoin payment with Lawson, advancing new growth areas beyond traditional telecom.

    Shows new business initiatives that could drive future revenue.

  • Ended Rakuten roaming and Oasis bid support KDDI ended Rakuten roaming to ease network congestion and weaken a rival, while Oasis's push for a higher Kakaku.com bid benefited KDDI's retained stake.

    Highlights competitive and financial positives from strategic moves.

  • Massive data leak and regulatory fallout A leak exposed 12.23 million emails and 7.62 million passwords, drawing privacy-regulator guidance and raising fine, remediation, and reputational risks.

    Major security breach with financial and reputational consequences.

  • Kumamoto earthquake disruption and Kakaku alliance end The Kumamoto earthquake disrupted mobile service, adding repair costs and customer inconvenience, while KDDI ended its Kakaku.com capital alliance though it kept a 17.7% stake and business ties.

    Operational and strategic setbacks that weighed on performance.

August 2026
▲2▼1

KDDI cuts Rakuten roaming, ends Kakaku.com alliance, expands BMW and crypto

  • KDDI ends Rakuten roaming, weakening a rival KDDI stopped lending its network to Rakuten Mobile in cities from October, saying the network was too congested. This frees capacity for KDDI's own users and makes Rakuten's service worse, which could slow customer losses and support KDDI's pricing power.

    This is the biggest competitive event of the period and directly affects KDDI's network quality and market position.

  • BMW picks KDDI for U.S. connected-car service BMW launched a connected-car platform in the U.S. with Verizon and KDDI, using 5G and IoT to link new cars to data services. This expands KDDI's business beyond phones into a growing area, adding a new source of revenue over time.

    It shows KDDI winning a global automaker contract, a new growth driver outside its mature home market.

  • Kakaku.com buyout battle and alliance end Oasis pushed for a higher bid for Kakaku.com, where KDDI is a major shareholder, potentially lifting the value of KDDI's stake. But KDDI and Kakaku.com then ended their capital alliance, though KDDI keeps its 17.7% holding and business ties continue.

    It covers the main capital-markets event affecting KDDI's stake value and strategic ties.

  • Privacy watchdog reprimands KDDI over data leak Japan's privacy regulator issued administrative guidance to KDDI after a breach exposed data on about 12.23 million people, saying KDDI failed to limit the damage. This raises the risk of fines, remediation costs and reputational harm that could weigh on the shares.

    It is the main regulatory and reputational risk to KDDI this period.

Latest
▲2▼1

KDDI cuts Rakuten roaming, ends Kakaku.com alliance, expands BMW and crypto

  • KDDI ends Rakuten roaming, weakening a rival KDDI stopped lending its network to Rakuten Mobile in cities from October, saying the network was too congested. This frees capacity for KDDI's own users and makes Rakuten's service worse, which could slow customer losses and support KDDI's pricing power.

    This is the biggest competitive event of the period and directly affects KDDI's network quality and market position.

  • BMW picks KDDI for U.S. connected-car service BMW launched a connected-car platform in the U.S. with Verizon and KDDI, using 5G and IoT to link new cars to data services. This expands KDDI's business beyond phones into a growing area, adding a new source of revenue over time.

    It shows KDDI winning a global automaker contract, a new growth driver outside its mature home market.

  • Kakaku.com buyout battle and alliance end Oasis pushed for a higher bid for Kakaku.com, where KDDI is a major shareholder, potentially lifting the value of KDDI's stake. But KDDI and Kakaku.com then ended their capital alliance, though KDDI keeps its 17.7% holding and business ties continue.

    It covers the main capital-markets event affecting KDDI's stake value and strategic ties.

  • Privacy watchdog reprimands KDDI over data leak Japan's privacy regulator issued administrative guidance to KDDI after a breach exposed data on about 12.23 million people, saying KDDI failed to limit the damage. This raises the risk of fines, remediation costs and reputational harm that could weigh on the shares.

    It is the main regulatory and reputational risk to KDDI this period.

July 2026
▲2▼2

KDDI Expands Connected-Car and Stablecoin Pilots, but Data Leak and Quake Hit

  • Massive email/password leak confirmed KDDI confirmed 12.23 million email addresses and 7.62 million passwords leaked from its email system. This raises the risk of customer loss, fines, and repair costs, weighing on the share price.

    A large security breach directly threatens KDDI's reputation and costs, a key negative force on the stock.

  • BMW connected-car deal with Verizon KDDI's platform will manage 5G/LTE connectivity for new BMW and MINI cars in the U.S. via Verizon. This adds a major automaker client, supporting future service revenue and showing KDDI's global reach.

    A new international contract expands KDDI's high-value connected-car business, a positive growth driver.

  • Stablecoin payment pilot at Lawson KDDI and Lawson will test Japan's first in-store stablecoin payment using JPYC at a KDDI-operated store. Success could open new payment revenue and position KDDI in digital finance.

    This pilot shows KDDI testing a new technology that could become a future revenue stream, a positive innovation signal.

  • Kumamoto earthquake disrupts mobile service Power outages and transmission failures from the Kumamoto earthquake left KDDI and rivals' mobile services down in parts of the prefecture, with no restoration timeline. This adds repair costs and short-term customer inconvenience.

    A natural disaster causing network outages directly hurts KDDI's operations and may require costly repairs, a negative event.

▲2▼2

KDDI Expands Connected-Car and Stablecoin Pilots, but Data Leak and Quake Hit

  • Massive email/password leak confirmed KDDI confirmed 12.23 million email addresses and 7.62 million passwords leaked from its email system. This raises the risk of customer loss, fines, and repair costs, weighing on the share price.

    A large security breach directly threatens KDDI's reputation and costs, a key negative force on the stock.

  • BMW connected-car deal with Verizon KDDI's platform will manage 5G/LTE connectivity for new BMW and MINI cars in the U.S. via Verizon. This adds a major automaker client, supporting future service revenue and showing KDDI's global reach.

    A new international contract expands KDDI's high-value connected-car business, a positive growth driver.

  • Stablecoin payment pilot at Lawson KDDI and Lawson will test Japan's first in-store stablecoin payment using JPYC at a KDDI-operated store. Success could open new payment revenue and position KDDI in digital finance.

    This pilot shows KDDI testing a new technology that could become a future revenue stream, a positive innovation signal.

  • Kumamoto earthquake disrupts mobile service Power outages and transmission failures from the Kumamoto earthquake left KDDI and rivals' mobile services down in parts of the prefecture, with no restoration timeline. This adds repair costs and short-term customer inconvenience.

    A natural disaster causing network outages directly hurts KDDI's operations and may require costly repairs, a negative event.