Declining Investment Attractiveness of Japan's Telecom Industry: The Industrial Logic Behind the Transformation of the Growth Model

The Growth Paradox: Rising Revenue, Stagnant Profits

Japan’s telecommunications industry is caught in a “growth paradox.” In the March 2025 quarter, the country’s telecom service revenue rose 6.3% year over year, while operating profit edged up 1.6%, marking three consecutive quarters of growth. However, according to a recent report from Morningstar Equity Research, the structural flaws in this growth have already raised investor alarm: core mobile service revenue is almost stagnant, while expansion into low-margin businesses such as finance, energy, and internet data centers is diluting overall earnings quality.

For a capital market accustomed to the stable, high profits of Japanese telecom operators, this shift is nothing short of a “warning letter.” The average forward P/E ratio of Japanese telecom stocks has reached 14.7x, with valuations near 1.01 times fair value, while the average forward dividend yield stands at only 3.6% — the lowest among major Asian markets. In contrast, China and South Korea, thanks to their more stable competitive environments and better valuations, have become more favored destinations for institutional investors.

Profit Dilution: The Price of Shifting from “Pipeline Operator” to “Platform Operator”

Japan’s three major telecom operators — NTT, KDDI, and SoftBank — are all pursuing business diversification in unison, an inevitable response to the saturation of the domestic market. Over the past decade, mobile subscriber penetration has hit a ceiling, and ARPU (average revenue per user) has continued to decline. In search of growth, the operators have dived into adjacent areas such as payments, energy, cloud computing, and data centers.

But this transformation brings with it a classic “profit margin dilution effect.” Mobile communications, the high-margin cash cow, is accounting for a shrinking share of revenue each year; while new businesses like fintech and green power resale grow quickly in scale, their gross margins are far lower than those of traditional telecom operations. Morningstar points out that if the contribution from low-margin businesses is excluded, the underlying operating profit of Japan’s telecom sector is still declining slightly. This means that current revenue growth is not translating into a commensurate increase in shareholder value.

Particularly noteworthy is that operators’ capital expenditure on new businesses remains high. Rakuten Mobile is the most extreme case: although its EBITDA loss has narrowed, high capital spending has widened its free cash flow deficit from approximately ¥18.47 billion (US$1.14 billion) a year ago to ¥30.78 billion (US$1.9 billion). The company’s mobile business is not expected to reach operating profit breakeven until 2028–2029.

Competitive Landscape: A Three-Way Battle and a Structural Stalemate## Competitive Landscape: Tripartite Turmoil and Structural Stalemate

The level of competition in Japan's mobile market is among the highest in Asia. Three major players—SoftBank, NTT DoCoMo (now part of the NTT Group), and KDDI—have long held over 90% of market share, while Rakuten Mobile, as the fourth entrant, has triggered successive rounds of price wars through its low-price strategy. However, unlike many markets where price wars eventually lead to an oligopolistic equilibrium, Japan's competitive landscape seems to have fallen into a "low-level equilibrium": operators mutually restrain each other on pricing, dragging down the overall industry profitability, yet market share changes are extremely slow.

Morningstar characterizes the Japanese market as "uncomfortable competition" and notes that competition in Singapore is equally fierce, but Japan's problem lies in operators lacking effective means to break free from price wars through mergers or differentiated services. This is related to the Japanese government's strict regulation of the telecommunications industry and consumers' high sensitivity to prices.

Market Advantages of China and South Korea: Stability and Value

In contrast, the telecom markets of China and South Korea are more attractive in the eyes of investors. China's three major operators benefit from government control over market order, resulting in relatively orderly competition, and they have a huge user base and the growth dividend of data center businesses. In South Korea, due to differentiated competition in 5G and AI services among SK Telecom, KT, and LG U+, profitability is stronger. Japanese operators are at a disadvantage in valuation, with an average forward P/E ratio of 14.7 times (about 9 times for Chinese operators, about 12 times for South Korean ones), and their dividend yields are not as high as their Chinese and South Korean counterparts.

Strategic Implications: "Second Venture" of Japan's Telecom Industry and the Patience of Capital Markets

The current state of Japan's telecom industry reflects the common dilemma of mature market operators in the digital wave: old growth engines are slowing down, while new businesses are still in the investment phase. This transformation is essentially a "second venture," but capital markets have limited tolerance for startup projects. SoftBank's four-star rating (0.92 times fair value) is partly due to its portfolio including technology assets like Arm and Yahoo Japan, making its valuation logic more flexible. NTT and KDDI both have three-star ratings, reflecting the market's wait-and-see attitude toward their transformation results.

From a broader industrial perspective, the ups and downs of Japan's telecom industry are not an isolated event. They are structurally similar to the "traffic dividend peak" faced by Chinese operators and the "5G investment return cycle" of South Korean operators, but the intensity of competition in the Japanese market magnifies the pain. In the future, whether profit margins can be improved through high-end services such as AI services, enterprise solutions, and edge computing will determine whether Japan's telecom industry can reshape its investment value.

For industry researchers, the story of Japan's telecom industry provides an excellent case study: when a technology-driven business model shifts from "connectivity" to "intelligence," the valuation logic and competitive rules of enterprises will undergo fundamental changes. And the capital market's aversion to "low-profit growth" is forcing Japanese operators to accelerate the search for a true second curve.