If you follow many Tanuki to their end point, you'll trigger this achievement. I'm sorry I did not keep the count as I was not aware of this achievement. It is a
Version 2.0] "All 15 Tanuki Locations" Hidden Achievement: Yamada Go's Wooden Mallet Genshin Impact | HoYoLAB
Yamada Go's Wooden Mallet - Achievement - Genshin DB
Genshin Impact 2.0: All Secret/ Hidden Achievements in Inazuma – GAMERPILLAR
Here's my mallet - Paul Sellers' Blog
Here's my mallet - Paul Sellers' Blog
60% Inazuma exploration : r/Genshin_Impact
Yamada Go's Wooden Mallet | Genshin Impact Wiki | Fandom
Êrîc Prôbâbly (@RexyAce) / X
Yamada Go's Wooden Mallet | Genshin Impact Wiki | Fandom