About the name Tadashi
Tadashi belongs to the Japanese tradition. Its roots are documented, even though its precise meaning is not recorded in the standard references — an honest gap we prefer to a confident guess.
In the United States, Tadashi first appears in Social Security records in 1912. It climbed to its best-ever rank of #1169 in 1917, and in 2024 9 babies received the name — 665 in total since 1880. Those are the official counts, not estimates.