One brokerage account for Japanese stocks, automated orders and tax-free monthly investing sounds wonderfully tidy. Tachibana Securities complicates that dream: its e-Shiten service does not offer the NISA recurring-investment allowance, while Stock House does.[1][2]
Two services, two different toolkits
Both services support the NISA growth-investment allowance. For the recurring-investment allowance, however, you need Stock House. Its mutual-fund savings plans allow scheduled purchases starting at ¥5,000, in ¥1 increments. Mutual-fund purchase and sale commissions are zero, while ongoing fund expenses still apply.[2][3]
e-Shiten has another attraction: an API intended for people building their own Japanese-equity trading systems.[4] Do not assume Stock House provides the same API.
The real surprise: you cannot keep both
Tachibana's account rules prohibit a customer from holding e-Shiten and Stock House accounts simultaneously.[5] Switching to Stock House for recurring NISA investment therefore means reconsidering how you execute automated stock orders.
The two NISA allowances also belong with the same financial institution; you cannot assign the growth allowance to one provider and the recurring allowance to another.[3] That does not prevent you from keeping a normal taxable brokerage account at e-Shiten while using NISA at a different company.
Fewer accounts are not always less work
An automated savings plan may need little attention after setup. Giving up access to a trading API merely to reduce your account count could create more work, not less.
Moving your NISA institution involves paperwork and timing rules. Purchases made during the year can prevent a same-year change, and existing NISA holdings do not transfer intact into the receiving provider's NISA account.[3][6] As of 26 October 2026, a new change request should be considered in terms of the 2027 NISA year.
Bottom line: Tachibana offers recurring NISA investments through Stock House, not e-Shiten. If programmable stock trading is your priority, keeping e-Shiten and using a different provider for NISA can be more practical.
An overenthusiastic spring-clean can throw out the toolbox along with the clutter.
Official sources
References (6)
- Tachibana Securities, e-Shiten NISA rules e-shiten.jp
- Tachibana Securities, Stock House recurring investment t-stockhouse.jp
- Tachibana Securities, Stock House NISA FAQ t-stockhouse.jp
- Tachibana Securities, e-Shiten API e-shiten.jp
- Tachibana Securities, accounts cannot coexist e-shiten.jp
- Financial Services Agency, NISA FAQ fsa.go.jp
