As you can see in the picture, it's hard for me to point to him with the mouse

In 1.12.2, there was a certain code that was needed in the test environment to make the models and hitboxes match.

However, I found that this code caused models and hitboxes to not match in Minecraft. And when this code is removed, the models and hitboxes will match in Minecraft.

Therefore, this issue will be fixed in the next update.

Thank you very much! This problem has been bothering me for a long time. I wish your mod continued to be great. I really like this Japanese style mod

Thank you for your report.
I'll try to think of a better way.

After that, I have found something about ChinjufuMod's Chestnuts.

When OptiFine is installed, its model and its hitbox do not match.
However, when OptiFine is removed and VanillaFix is installed, its model and its hitbox match.

Japanese Timber Bamboo in Urushi-1.12.2-alpha2.38 also gave similar results to ChinjufuMod's Chestnuts.

Therefore, I think that this phenomenon is caused by OptiFine.