Their politicians may be able to make such statements, but I strongly doubt the general Japanese public has the will (or the stomach) to shed blood for Taiwan (or for anyone else) except to defend themselves... 75+ years of US pacification has totally pacified the Japanese martial spirit... Their SDF may have 1st rate equipment and training, but not their civilian population.. They are a peaceful and pacifist nation with a docile (and shrinking) population now.. they (including JSDF) are simply not psychologically prepared to fight for such a conflict..
Any Japanese participation in the defense of Taiwan will at most be limited to providing money, remote surveillance, intelligence, SAR..
Any Japanese participation in the defense of Taiwan will at most be limited to providing money, remote surveillance, intelligence, SAR..