The two dominant low-cost brokers compared on products, fees and FX, recurring/card investing, points, and ecosystem fit.
SBI and Rakuten are the two dominant low-cost brokers with very similar core offerings — broad NISA menus, ¥0 covered NISA trades, 0.495%/US$22 taxable US commission, and recurring/card investing; the decision usually comes down to which ecosystem (SMBC/V Points vs Rakuten) you already use.
SBI and Rakuten are the two default low-cost brokers for self-directed Japanese investors, and their core offerings are strikingly similar. Both provide broad NISA fund menus with ¥100 minimums, ¥0 commissions on NISA-covered domestic and US shares and funds, recurring purchases, credit-card investing, and comparable taxable US-stock pricing (about 0.495%, capped at US$22) with advertised zero real-time USD/JPY spreads.
For a beginner buying a low-cost index fund monthly in NISA, either is an excellent choice, and the practical experience is very close. The differences are at the margins — ecosystem, app feel, and specific product breadth.
The main differentiator is ecosystem. SBI integrates with SMBC/Olive and V Points and card investing through SMBC cards; Rakuten integrates with Rakuten Card, Rakuten Bank, Rakuten Cash, and Rakuten Points. If you already shop, bank, or spend heavily in one of these worlds, that broker’s integration is more convenient and its points more useful to you.
On breadth, SBI is often cited for the widest one-stop product range (many foreign markets, bonds, IPO access), while Rakuten is prized for a polished app and smooth fund accumulation. Both change reward rates and conditions frequently, so treat point rates as a secondary factor.
Because the core is so close, choose on ecosystem fit and app preference, not on a small point-rate difference that may change next quarter. If you use SMBC/Olive or want the broadest product range, SBI leans ahead; if you live in the Rakuten ecosystem or prefer its app, Rakuten does. Many investors could use either and be well served.
Remember you can only make new NISA purchases at one institution per year, and existing holdings stay if you switch — so pick the one you will happily keep for the long term rather than chasing a temporary promotion.
Brokerage (NISA/iDeCo) · Rakuten Securities
A leading low-cost brokerage for NISA and index-fund investing, integrated with Rakuten points and Rakuten Bank.
Fees: Many domestic funds and trades are low- or no-commission — verify current fee schedule.
Brokerage (NISA/iDeCo) · SBI Securities
Japan’s largest online brokerage by accounts, with a very broad low-cost fund lineup and full NISA/iDeCo support.
Fees: Many trades and funds are low- or no-commission — verify current fee schedule.
Brokerage (NISA/iDeCo) · Monex
An established online brokerage often chosen for US-stock access and research tools, with NISA and iDeCo support.
Fees: Commissions vary by product; some funds/trades are low-cost — verify current schedule.
This is education, not a recommendation. Most beginners research low-cost, broadly diversified index funds — for example all-country (全世界株式) or S&P 500 trackers — rather than picking individual stocks, because low fees and diversification are within your control while returns are not. Understand that values fall as well as rise, match the risk to your time horizon, and never invest money you may need soon.