RSM Shiodome Partners is the tax arm of a group operating as a member of the RSM international network. Its published service range is tax-led rather than set-up-led: international tax consulting, inbound and outbound investment tax, M&A tax, business succession and inheritance tax, alongside monthly and quarterly accounting, tax return preparation and bookkeeping.
Incorporation, payroll, visa support and bank account assistance are not mentioned on the page checked, so founders needing those will likely be combining this firm with another. No fees are published.
Note that the immigration practice listed separately here as Nakai Immigration Services LPC now operates under the RSM Shiodome Partners AS name and belongs to the same group. They are listed separately because they are different entities offering different services — tax here, visa work there — but they are not independent of each other.