Japan’s telecommunications industry has seen a series of major restructuring moves in recent years. NTT Docomo’s acquisition of Sumishin SBI Net Bank, KDDI’s strengthened partnership with MUFG Bank, and SoftBank’s synergy creation with LINE Yahoo all point to telecom companies accelerating expansion into non-telecom fields. This article summarizes key points from the latest domestic telecom restructuring.

NTT Group Moves

Following the full subsidiary acquisition of Docomo, the NTT Group is drawing attention for its full-scale entry into the financial sector. Through the acquisition of Sumishin SBI Net Bank, Docomo aims to merge its d-points ecosystem with banking services. Integration of NTT Data and NTT Communications for enterprise business restructuring is also underway.

Behind these moves lies the growth limitations of a maturing telecom market. With voice and mobile data services alone offering limited revenue growth, the shift toward growth fields like finance, data centers, and enterprise IT solutions is accelerating.

KDDI Strategy

KDDI maintains its focus on the financial sector through au Jibun Bank while strengthening its capital and business alliance with MUFG Bank. The company is also emphasizing flexible pricing plans through its sub-brand povo and expanding local 5G for enterprise customers.

Notably, KDDI has adopted a Life Design strategy that leverages communication infrastructure while offering comprehensive lifestyle services spanning finance, energy, and entertainment. Under this strategy, the company is actively pursuing cross-industry partnerships.

SoftBank Group Developments

SoftBank Group completed its management integration with Z Holdings (now LINE Yahoo), deepening the fusion of telecom and internet services. Synergies are expected from financial services centered on PayPay and collaboration with Yahoo’s various internet services.

SoftBank is also actively investing in AI, focusing on nurturing AI-related businesses across the group. Services leveraging ARM’s high AI processing performance are expected to drive future growth.

Rakuten Mobile Status

Rakuten Mobile has struggled with its proprietary mobile network construction but has steadily expanded coverage. As of 2026, population coverage exceeds 98% and the network has entered practical use. Service integration with the Rakuten Group’s ecosystem will be a key differentiator going forward.

Conclusion

Restructuring in the domestic telecom industry is progressing as companies diversify beyond telecommunications into finance, AI, and lifestyle services. While this trend offers users the benefit of more integrated services, it also makes it important to understand each company’s strategic differences when choosing services.