Interestingly enough, this case mentions the Nagano department being nearby.
Nagano and Gunma being close is a recurring joke in the series, because Yamamura tends to appear when the case is close to Nagano (and Conan&Co are far from happy to see his face XD ).
Well I say this, but the Nagano police has yet to appear in the series.
groudonvert
2025-04-19 02:35:33 +0000 UTC
We already met Eri's assistant. Her first (and only appearance for now) is in the second movie.