His pay sounds small in retrospect and hardly compares to what Elon extracts from Tesla, but still deemed high by Japan's standards where employee's jobs are considered sacrosanct in a more just system. Ultimately that was why he was hired in the first place, and Nissan needed such a outsider at a critical moment to reform themselves but didn't learn from it unfortunately.
Asianometry: https://www.youtube.com/watch?v=qsL6JAUZFiQ