None of the investment services are offered in English, but if you are willing to content with some Japanese UIs, Sony Bank has started to offer the eMaxis Slim series as a part of their investment trusts offerings.
Sony Bank also offers a NISA account, so if you want to keep everything simple and go with 100% eMaxis Slim All Country, you could find a competitive brokerage alternative in Sony Bank.
Investment trust contributions count towards their Club S Rankings and some of those higher tier Club S benefits do sound pretty great.
https://sonybank.jp/products/clubs/
Sony is offering campaigns for this initial sign up period: https://sonybank.jp/campaign/fund202510/?intcmp=bnr_fund_fund202510
Fund details: https://sonybank.jp/products/fund/column/emaxisslim.html
by kite-flying-expert