Local travel within Japan wasn’t as frowned upon as it was in 2020. With remote work becoming a thing, a ramen hunter could easily book a cheap business hotel in any major city in Japan and hang out as long as it takes to crush the best ramen that city has to offer.
オランダ軒 - Holland House
埼玉県
Saitama
Fantastic Kitakata (or is it Shirahama or Yamagata) style ramen with as many eggs as you can fit into a bowl.

食煅 もみじ - Momiji

山﨑麺二郎 - Yamazaki Men Jiro
京都府
Kyoto
A classic chukasoba that is the polar opposite of the Jiro you might be thinking of.

晴耕雨読 - Seikoudoku

らーめん かねかつ - Kanekatsu

櫻井中華そば店 - Sakurai Chukasoba

中華そば 髙野 - Takano

麺屋 白神 - Hakushin

ラーメン イロドリ - Irodori
岐阜県
Gifu
Gifu's famous toripaitan shop is responsible for putting out some top-level talent in the ramen world.

ラーメン ニッコウ - lamen Nikkou
滋賀県
Shiga
A destination ramen shop with a constantly changing limited menu and a great craft beer selection.

中華そば処 琴平荘 - Konpiraso
