I am in the process of helping my wife (33, Japanese, full-time company worker) sign up for iDeCo. Before we open an account, I'd like to get some feedback from forum members.
1. Do I correctly understand what the funds are?
2. Does the asset allocation make sense?
We are thinking of opening an account with Rakuten. This is based mainly on a simple brand preference. We will also get some additional points through Rakuten Marketplace by signing up for a brokerage account. SBI Securities does have a cheaper equities fund, but it is only cheaper by 2 basis points ( SBI・全世界株式インデックス・ファンド(雪だるま(全世界株式)) Expense Ratio 0.10800% ). Is it silly not to go with the cheapest fund and SBI?
My plan is to go with a simple set it and forget it 75 / 25 portfolio:
75% 楽天・全世界株式インデックス・ファンド(楽天・バンガード・ファンド(全世界株式))パッシブ Expense Ratio 0.12960%
25% たわらノーロード国内債券 パッシブ Expense Ratio 0.15120%
My understanding is that the first fund is a world equities index fund, basically with similar (the same?) holdings as VT (Vanguard Total World Stock ETF). My understanding of the second fund is that it is a passive Japanese bond fund.
By the way, Retire Japan's iDeCo guide has been extremely helpful and informative in this process for anyone who hasn't purchased it yet.

Looking forward to hearing what everyone thinks.
Thank you,
Merican