Stay-at-Home Mom Moving to Japan: Finances and Banking

My Japanese husband and I recently got married, and as he is a Japanese expat, we're planning our move to Japan. We've been discussing our financial approach and agreed on a system that works for us: a shared account for household and child expenses, and separate personal accounts from which we'll each receive a monthly allowance.
However, I've recently learned that joint bank accounts aren't common in Japan. This has led me to a new set of questions, and I'm hoping to hear from those with personal experience. I've read some great posts on Reddit, but they often focus on situations with a foreign man and a Japanese woman, and I'd love to hear from other perspectives.
As this will be my first time living in Japan and I'll be a stay-at-home wife and mom, I'm not familiar with the local financial system. Any insights or advice on how to navigate this would be incredibly helpful.

by Chemical-Fix2863