SBI Shinsei vs Sumishin Net Bank (NEOBANK): Which is better for NISA ETF investing?

Hi everyone, I opened an account with SBI Shinsei Bank last week. My short-term goal is to open both a NISA and an iDeCo account to invest mainly in major ETFs (World, S&P 500, EuroStoxx, TOPIX, EM, etc.).

I’m trying to figure out is which is better overall between SBI Shinsei Bank and NEOBANK SBI Sumishin NetBank for long-term investing — especially for:

  • Lowest possible fees (account, trading, hidden fees, etc.)
  • Best user interface and experience
  • Ease of managing NISA + iDeCo under one roof

NEOBANK SBI Sumishin NetBank seems to be Japanese-only, but I don't know if SBI Shinsei Bank’s investment platform offers English support.

Neobanks in my home country usually combine lower fees, better design, and fewer hidden costs, but I’m not sure that logic applies in Japan, and I hadn't come across NEOBANK SBI Sumishin NetBank so far, whereas SBI Shinsei was the bank I was the recommended the most alongside Rakuten Bank for a first bank account opening in Japan.

(PS: I originally tried to open an account with Rakuten Bank, but they rejected my application.)

Any insights or feedback would be super helpful.

by Comptest