【Bone】The value set by clicking the Load button in the Local Axes Setup is incorrect.

[korarei]

The local coordinates set by MMDTools are different from the MMD local coordinates.
(MMD→MMDTools : X→Y, Y→Z, Z→X)
Therefore, the values set in the current version need to be shifted in the modified version.
(current version→modified version : X→Z, Y(𝕩×𝕫 : X-vector and Z-vector cross product)→X)

fig1 Bone Settings in MMD Tools

fig2 Local Axes set by MMD Tools (red : x, green : y, blue : z)

fig3 Correct Local Axes (red : x, green : y, blue : z)

[korarei]

P.S.
Bones in Blender already have local axes. Therefore, MMDTools should convert this local axes direction vector for MMD and load it into MMDTools. Specifically, the x-vector, y-vector, and z-vector of the Blender bone should be loaded into MMDTools as the z-vector, x-vector, and y-vector, respectively.