The Private Sector Runs Three Years Ahead: What Strium's Testnet Timeline Reveals About Japan's Two-Speed Onchain Finance

The Timeline Strium Has Now Committed To

Startale and SBI Holdings jointly announced Strium on February 5, 2026, positioning it as a dedicated Layer 1 for onchain trading of all financial assets — crypto, tokenized equities and RWA-linked instruments — through spot and derivatives markets operating 24/7. It was framed as the first major milestone under the strategic partnership the two firms concluded in August 2025. At announcement the project was described as being in proof-of-concept phase; the latest statement moves it to a concrete schedule barely six months later. According to Watanabe, Strium will support tokenization of equities and government bonds, alongside settlement using JPYSC, the yen-denominated trust-type stablecoin that SBI and Startale launched in June 2026.

A Three-to-Five Year Gap Against the Official Plan

The Nikkei reported on August 26, 2026 that the Financial Services Agency, Ministry of Finance, Bank of Japan and financial institutions will convene a study group this summer, with an implementation plan due in early 2027. The central concept is converting a portion of banks' current account balances at the BOJ into blockchain-transferable tokens — in effect a wholesale central bank digital currency. If formally approved, operations would begin in the early 2030s, and the initiative may fall within the multi-year strategic investment framework the government plans to establish from the fiscal 2027 budget. Japanese equities currently settle two business days after execution and government bonds one; instant settlement would let investors redeploy sale proceeds immediately.

If Strium's mainnet goes live within fiscal 2026, a gap of at least three and possibly more than five years opens before the public infrastructure arrives. Watanabe framed this deliberately, describing his intent to contribute by delivering working systems while the government and central bank work through institutional design.

What Settles the Trades in the Interim?

This is where management attention belongs. Once tokenized equities and government bonds trade around the clock, what is the payment leg? Strium anticipates JPYSC — a privately issued trust-type stablecoin — not tokenized central bank reserves. For several years until the early 2030s, Japan will therefore host a tokenized securities market that does not settle in central bank money.

International settlement principles have long held that systemically important settlement should occur in central bank money wherever possible, because private money introduces issuer credit risk into the settlement process. Trust-type stablecoins offer strong protection through bankruptcy remoteness, but they are not equivalent to central bank money. How to evaluate that difference, and what transaction scale makes it acceptable, is a judgment each participating institution must make for itself.

Who Holds the Register?

The second unresolved question is the ledger. Strium describes itself as the foundational exchange layer for onchain securities markets in Asia. "Exchange layer" is not a claim to replace the register itself. Rights in listed Japanese equities are administered by the Japan Securities Depository Center under the book-entry transfer act, and government bonds run through the BOJ's book-entry system. Whether Strium's tokens mirror those registers or assume their legal status changes everything — the legal character of the instrument, the risk profile, and the investor protection framework.

Mitsubishi UFJ Financial Group, which plans to settle Japanese government bond repo transactions on chain as early as fiscal 2027, faces the identical question. The design of register access and synchronization is the real competitive axis in this domain.

What This Means for Management

Startale raised approximately 8 billion yen from SBI Group in 2026, bringing its Series A total to roughly 10 billion yen including Sony Innovation Fund. Combined with SBI Holdings' customer base of more than 80 million domestically and abroad, the resources for implementation are in place. The open question is when, and in what capacity, an institution joins a market that will be operating well before the public infrastructure supporting it exists.

[Business Development Insights]

1. Decide participation timing on the premise of a two-speed structure. The three-to-five year gap between a private Layer 1 arriving within fiscal 2026 and public instant settlement arriving in the early 2030s is the single most important structural fact in Japanese onchain finance. Participating during that window brings first-mover knowledge and a voice in standard-setting, at the cost of accepting settlement credit risk outside central bank money. Declining means entering the standardization debate late. This should reach the board as a risk-appetite question, not a technology evaluation.
2. The first item to verify in any partnership is the relationship to the register. Before joining a platform that describes itself as an exchange layer, an institution should obtain in writing how its tokens connect to the JASDEC and BOJ book-entry systems. If the design mirrors the register, who bears synchronization-failure risk? If it assumes the register's status, how is that reconciled with the statutory framework? This single point fundamentally changes the nature of the business risk.
3. Run study-group participation and internal implementation in parallel. Before the implementation plan is finalized in early 2027, Strium, MUFG's government bond repo settlement and the megabanks' joint stablecoin will all reach operational stages. The options debated in institutional design will be heavily shaped by what is already running. Engaging with standardization while building, rather than waiting for standards before building, is the realistic strategy at this juncture.

[Sources]

CoinPost, "Startale CEO: Strium testnet within the year, finance-focused Layer 1 blockchain" (August 27, 2026) https://coinpost.jp/?p=733578 Sota Watanabe, post on X (August 26, 2026) https://x.com/SotaOnchain/status/2092414096054579547 Startale, "Startale and SBI Holdings announce Strium, a Layer 1 blockchain for next-generation onchain financial transactions" (February 5, 2026) https://startale.com/ja/blog/strium-announcement STARTALE LABS PTE. LTD. press release (PR TIMES, February 5, 2026) https://prtimes.jp/main/html/rd/p/000000017.000114522.html Nikkei, "Instant settlement for government bonds and equities: government and BOJ begin blockchain infrastructure work" (August 26, 2026) https://www.nikkei.com/article/DGXZQOUB056AP0V00C26A8000000/ Neweconomy, "Japanese government and BOJ to build blockchain infrastructure for instant settlement of government bonds and equities, tokenizing BOJ current account deposits" (August 26, 2026) https://www.neweconomy.jp/posts/602317 CoinPost, "Government and BOJ begin work on blockchain instant settlement for bonds and equities; study group and 2027 plan" (August 26, 2026) https://coinpost.jp/?p=733359 Nikkei, "MUFG to launch instant JGB transactions as early as fiscal 2027 using blockchain" (August 2026) https://www.nikkei.com/article/DGXZQOUB048PJ0U6A800C2000000/ CoinPost, "Startale raises approximately 8 billion yen from SBI, accelerating JPYSC and Strium development" https://coinpost.jp/?p=696854 CoinPost, "SBI Holdings and Startale Group announce strategic joint venture" https://coinpost.jp/?p=644582 SBI VC Trade, "JPYSC: Japan's only trust-type yen-denominated stablecoin" https://www.sbivc.co.jp/jpysc