| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2009 | J1 League | 20 | 1727 | 2 | 0 | 0.1 | — |
| 2012 | J2-League | 33 | — | 1 | — | — | — |
| 2013 | J2-League | 22 | — | 0 | — | — | — |
| 2014 | J2-League | 10 | — | 0 | — | — | — |
| 2015 | J2-League | 6 | — | 0 | — | — | — |
Domestic league competitions only (SportMonks sub_type='domestic'); national-team, continental and cup competitions are excluded. Classification resolved by league id against the canonical leagues index. G+A/90 computed from minutes actually played.
Figures computed from the GioScore season-stats database · as of 2026-09-06
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Ventforet Kofu | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Tokushima Vortis | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Fagiano Okayama | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 V-Varen Nagasaki | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 ThespaKusatsu Gunma | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Roasso Kumamoto | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Ehime | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Kataller Toyama | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Tochigi | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Gainare Tottori | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
In the 2015 J2-League, Masahiro Koga made 6 appearances.
His league career on record ran from 2009 to 2015: 5 seasons across 2 clubs.
Split by competition, the league record covers 2 domestic leagues: J2-League (71 appearances, 1 goal) and J1 League (20 appearances, 2 goals). 1 of those 5 recorded campaigns ended with 25 league appearances or more. Three straight seasons stand out for volume — 2012–2014, 65 league games, 22 a year.
