In the end I have decided to go for the option to join the company's DC but with only company contributions, with a generous 28,000 yen / month. It is a matching DC but you can decide not to match the company's contribution. That way I can continue to contribute to SBI´s iDeCo, but lowering my current 23,000 month contribution to 20,000 yens.
I know I am not maximizing tax reduction (I could have chosen to stop iDeCo contributions at SBI and go for matching company's contribution with 27,000 to reach the top monthly of 55,000 yen) but I am okay this way.
Know it's time for me to contact SBI to ask them for the documents to be filled up by my current employer. But I got confused by all the options at the SBI´s side.
I think I am in the following scenario:
転職等で勤務先が変更した(加入者【掛金をかけている方】のみ)
変更後の勤務先は共済組合員以外
Given that scenario there are 3 sub-options:
1st option:
変更後の勤務先で企業型確定拠出年金がない、
もしくは企業型確定拠出年金はあるが加入しない
または、変更後の勤務先の企業型確定拠出年金に加入する場合で以下の条件を全て満たしている
・マッチング拠出を行っていない
・掛金が年単位化されていない(毎月拠出)
2nd option:
企業型確定拠出年金がある場合で、以下のいずれかに該当している
・企業型確定拠出年金でマッチング拠出を始める
・企業型確定拠出年金での掛金が年単位化となっている
3rd option:
2022年9月30日以前より企業型確定拠出年金に加入しており、加入時点の企業型確定拠出年金の規約においてiDeCoとの同時加入を認めていなかった
Given that my Japanese is a bit rusty, I understand that I might be in either "1st option" or "2nd option", but I am a bit confused when reading them.
It seems to me that "1st option" states that:
The new company does NOT have a Company DC or) it has a Company DC but I am NOT joining it or) it has a Company DC, I am joining it AND there is not matching from my side occurring AND there is no annualization of the contribution.
And the "2nd option states that:
The new company does have a Company DC and one of the next options is met: a) I do matching contributions OR b) I do choose an annual contribution.
My conclussion
Correct me if I am wrong, but
I think my case would be the "1st option", where I have iDeCo and contributing the max 23,000 yen, I joined a new company that has a Company DC, that I decide to join, but without contributing to it (no matching).
This is their website with all the options. I think that after using one I am redirected to a form where I need to fill up my data and they will likely send me the documents that I need my new employer to fill up so that the new iDeCo contribution limit is set (probably given my case 20,000 yen a month).
https://go.sbisec.co.jp/prd/ideco/application.html
Sorry for the confusion, but I hope it makes sense what I just wrote above. If anyone has been in a similar situation or can help on the topic I would appreciate it.