The My Number Card, which contains your personal 12-digit My Number, is more than just an identification document in Japan. Once registered through the Myna Portal, it can also function as a health insurance card, known as a Myna Hokensho. With a registered card, you can receive medical services at hospitals or pharmacies even if you do not have a traditional health insurance card.

https://www.belongingjapan.com/how-to-guide/finance/myna-hokensho-guide

在日外国人向けメディアサイト「belonging JAPAN」にて、解説記事が掲載されました。マイナンバーカードの保険証利用について解説しています。

記事はこちら
Myna Hokensho: Complete Guide for Foreign Residents in Japan