BIGLOBE Inc. Due Diligence

Run due diligence on BIGLOBE Inc.: check compliance and get alerts when suppliers change.

Japan · www.biglobe.co.jp · 14 vendors

BIGLOBE Inc. is a Japanese internet service provider and IT company that delivers networking services, content, and applications to residential and business users nationwide. The company offers a variety of internet connection services, including broadband connectivity and mobile services, along with digital content and platform services.

Resilience scores

Technology vendors

Services catalogue

2 services in catalogue across 2 categories; runs on 14 sub-vendors.

Insights

Last updated 2026-07-11 · revision 7

14 direct vendors, 185 subvendors

Direct vendors by controlling owner country (sample)

Subvendors by controlling owner country (sample)

Compliance

8 in-scope frameworks identified; showing 3.

ISAE 3000 (source) — No public evidence

Evidence: https://www.biglobe.co.jp/sustainability, https://www.biglobe.co.jp/outline

Telecommunications Business Act — No public evidence

Evidence: https://www.biglobe.co.jp/outline, https://www.biglobe.co.jp/pressroom/release/2026/06/260623-a, https://www.biglobe.co.jp/pressroom/release/2026/07/260706-a

SOC 2 (source) — No public evidence

Evidence: https://www.biglobe.co.jp/service, https://www.biglobe.co.jp/outline

Financials

Three-year financials

Financial Resilience Score: 7/10

BIGLOBE Inc. benefits from strong financial resilience primarily through its status as a 100% wholly-owned subsidiary of KDDI Corporation since January 2017. This parent backing provides access to group financing, shared network infrastructure, and cross-selling opportunities with au/UQ mobile bundles combined with BIGLOBE Hikari fiber broadband, which significantly reduces standalone liquidity risk. The company's recurring subscription-based revenue model through its ISP (BIGLOBE Hikari via NTT fiber wholesale) and MVNO (BIGLOBE Mobile on au network) services produces predictable ARPU-based cash flows. As of the last standalone-disclosed period (FY2015/2016), BIGLOBE generated revenue of approximately ¥68-70 billion with mid-single-digit-billion yen operating income, indicating a profitable operational base at the time of the KDDI acquisition. However, resilience is tempered by several structural risks. Japan's consumer fixed-line broadband market is mature and highly commoditized, with margin pressure from competing offerings including NTT Docomo's docomo Hikari, SoftBank Hikari, and even KDDI's own auひかり (creating potential intra-group cannibalization). Government-driven mobile price cuts in 2020-2021 and the introduction of MNO sub-brands (ahamo, povo, LINEMO, UQ Mobile) have compressed MVNO margins industry-wide. Additionally, BIGLOBE has significant wholesale cost dependency on NTT East/West for FTTH and on KDDI for mobile network access. The absence of standalone audited financials since 2017 limits external credit assessment transparency, though creditors typically rely on the KDDI parent relationship. Recent cybersecurity incidents involving unauthorized access to BIGLOBE mail services present reputational risks in a subscription-driven business model.

Key strengths: 100% ownership by KDDI Corporation (TSE Prime: 9433) providing parent backing, Recurring subscription revenue from ISP and MVNO services, Established brand with ~30 years in Japanese consumer internet market, Cross-selling opportunities with au/UQ mobile bundles, Diversified adjacencies including points/rewards (G-PLAN), portal & media, and corporate solutions, Approximately 3 million ISP subscribers at time of KDDI acquisition

Risk factors: Mature and commoditized Japanese consumer broadband market, MVNO margin squeeze from government-driven mobile price cuts and MNO sub-brands, Wholesale cost dependency on NTT East/West and KDDI, Potential intra-group cannibalization with KDDI's auひかり, Limited standalone financial transparency since 2017, Cybersecurity exposure - multiple 2026 unauthorized access incidents on BIGLOBE mail service, Reputational risk in subscription-based business

Revenue by geography

Workforce by country

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