JapanNaoto Kai: Ranking, Schedule & Stats
- Age
- 29
Naoto Kai is a professional tennis player from Japan, born 18 April 1997.
This page tracks Naoto Kai's upcoming schedule, latest results, recent form and surface record, with each match linking through to a detailed head-to-head and pre-match analysis. Scores update live as matches are played.
Career highs
Umpiry Rating 1491
Ranking trajectory from our weekly snapshots (last ~12 months); peak rating and longest tour-level win streak from our match records. Umpiry rank is the player’s position by our rating — the arrow shows how many spots that is above (▲) or below (▼) their official ranking.
2026 season form
0–0W–L
Recent surface record
Hard0–2 (0%)
Career record
0–2W–L
Career surface record
Hard0–2 (0%)
Recent results
More Japan players
Frequently asked questions
When was Naoto Kai born?
Naoto Kai was born on 18 April 1997 (29 years old).
Where is Naoto Kai from?
Naoto Kai is from Japan.