Kokoro Isomura: Ranking, Schedule & Stats
Kokoro Isomura is a professional tennis player from Japan, born 22 January 2003. The Japanese competes on the ATP Tour and plays right-handed. Isomura stands 175 cm (5 ft 9 in) tall. The Japanese was born in Hiroshima.
This page tracks Kokoro Isomura'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.
Current form
2026 season2026Isomura has won 12 of the last 30 first sets
Isomura has won 4 of 11 deciding sets
Ratings & strengths
Umpiry ratings · updated dailySurface performanceSurfaces
2026 seasonLast 12 monthsCareerMost matches this season came on hard: 12–15.
Most matches over the last 12 months came on hard: 15–21.
Most matches across the career came on hard: 34–35.
Ranking & projection
ATP ranking · not EloATP · not EloRecent results
Last 5Beyond today · rivals & careerBeyond today
Rivals
Most meetings
Most-played rivals. The record is Isomura's wins–losses across all matches we have, qualifying excluded.
Season
Current seasonResults
Season breakdown
2026 · by level, surface, opponent, sets2026Career
Career overview
More career statistics
Career serve & return
Absolute totals across the 69 matches we have on record. Green is Isomura, grey is the same stat by the players they faced.
Aces
| Isomura | 444 |
|---|---|
| Opponents | 1,486 |
Double faults
| Isomura | 812 |
|---|---|
| Opponents | 740 |
1st serve in
| Isomura | 67% 12,544 / 18,646 |
|---|---|
| Opponents | 62% 11,580 / 18,816 |
1st-serve points won
| Isomura | 64% 8,020 / 12,544 |
|---|---|
| Opponents | 66% 7,636 / 11,580 |
Break points converted
| Isomura | 46% 895 / 1,952 |
|---|---|
| Opponents | 44% 889 / 2,042 |
Break points saved
| Isomura | 56% 1,153 / 2,042 |
|---|---|
| Opponents | 54% 1,057 / 1,952 |
1st-serve points won by season
| Season | Isomura | Opponents |
|---|---|---|
| 2026 | 67% | 69% |
| 2025 | 67% | 69% |
| 2024 | 64% | 65% |
| 2023 | 60% | 63% |
| 2022 | 62% | 62% |
| 2021 | 54% | 71% |
| Career | 64% | 66% |
Counted from the match statistics we hold, season by season — the cards above are career totals from our data provider, so the two can differ by a few tenths. Seasons with fewer than three matches on record are left out.
Career win–loss by level
| Level | W–L | Win % | Titles |
|---|---|---|---|
| Challenger | 8–20 | 29% | 0 |
| ITF / Futures | 90–90 | 50% | 1 |
Challenger and ITF matches are shown in grey and are not part of the tour-level total.
Season breakdown
Wins and losses in one season, split by round reached, surface, tournament level and opponent ranking band.
2026 season · 27–26 · W–L 51% · 53 matches
Round played
| Qualifying | 12–10 (55%) |
|---|---|
| R32 | 4–6 (40%) |
| R16 | 2–2 (50%) |
| SF | 1–0 (100%) |
| F | 0–1 (0%) |
Surface
| Hard | 20–24 (45%) |
|---|---|
| Hard (indoor) | 7–2 (78%) |
Tournament level
| Challenger | 12–15 (44%) |
|---|---|
| ITF / Futures | 15–11 (58%) |
Rounds are the round each match was played in, not a ladder: a player enters a 32-draw straight in R32, and team events (United Cup, Davis Cup) are not played through a draw at all — those have their own row. Ranking bands use the opponent's ranking on match day and are cumulative: top 100 includes top 10.
Surface record by season
Each cell is one season on one surface: the number is wins–losses, the colour is the win rate. Carpet is counted as indoor hard.
| Season | Hard | Clay | Grass | I.hard | Total |
|---|---|---|---|---|---|
| 2026 | 20–24 | · | · | 7–2 | 27–26 |
| 2025 | 32–29 | · | · | 2–2 | 34–31 |
| 2024 | 27–18 | 6–4 | · | 6–3 | 39–25 |
| 2023 | 25–29 | 0–1 | · | · | 25–30 |
| 2022 | 7–9 | 17–7 | · | · | 24–16 |
| 2021 | 4–2 | 2–6 | · | · | 6–8 |
| Career | 115–111 51% | 25–18 58% | · | 15–7 68% | 155–136 53% |
Record at one tournament
Every edition entered: year, best round reached, wins and losses. Most recent first.
M25 Sapporo · Editions 4 · Record 10–4 · Titles 0
| Year | Best round | W | L |
|---|---|---|---|
| 2026 | R32 | 0 | 1 |
| 2025 | Round 2 | 1 | 1 |
| 2024 | Final | 7 | 1 |
| 2023 | Quarter-final | 2 | 1 |
More on Umpiry · discovery
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Frequently asked · Kokoro IsomuraFrequently asked
How tall is Kokoro Isomura?
Kokoro Isomura is 175 cm (5 ft 9 in) tall.
When was Kokoro Isomura born?
Kokoro Isomura was born on 22 January 2003 (23 years old).
Where is Kokoro Isomura from?
Kokoro Isomura is from Japan, born in Hiroshima on 22 January 2003.
Is Kokoro Isomura right or left-handed?
Kokoro Isomura plays right-handed.
How good is Kokoro Isomura on hard?
Kokoro Isomura has won 49% of hard-court matches (34-35).
Cite this
Kokoro Isomura is ranked No. 657 in the ATP singles rankings with 55 points. Umpiry, "Kokoro Isomura: Ranking, Schedule & Stats", https://umpiry.com/players/kokoro-isomura-jpn?utm_source=cite (as of 9 September 2026).