He was against the attack for strategic reasons even though he did the tactical planning.
I could be wrong ?
No, I think you are correct, george76.
I dunno offhand. :’) Yamamoto was considered the great mastermind behind Japanese naval successes, and was tracked and finally assassinated (his plane shot down). The Japanese spent years building one of the largest navies in the world (perhaps it was *the* largest?) then lost much of it in just a handful of large (but not quite large enough) engagements. The Midway defeat probably would not have happened had that ridiculous feint toward the Aleutians not taken place, even with the US having broken the Japanese codes. The US victory at Midway was a close-run thing, and regardless of fighting spirit, a bit more Japanese firepower could easily have made the difference. The Japanese people weren’t told the significance, details, and extent of the Midway defeat until the middle of the 1950s.
In American this is called a “clue.” As in, “a clue that your nation is not ready to go to war with the United States much less the entire Western World.” Yamamoto got it; the Japanese Imperial General Staff, apparently missed it somehow.