Country rankings

Top GitHub contributors in Japan.

Movement compares each contributor’s current rank with their previous OSSRank measurement when a prior snapshot exists. Click the column buttons to sort by public PRs, repos, or followers instead.

20 contributors40227 candidates checkedWeekly refreshLatest 2026-07-03

Rank	Movement	Username					Location	Discovery
#1	→	mizchi Kotaro Chikuba	15,704	1,674	642	1,832	Tokyo/Japanmulti-location	location:Japan repos:>5 type:user
#2	→	tokuhirom Tokuhiro Matsuno	11,499	5,637	989	1,038	Tokyo, Japanmulti-location	location:Japan repos:>5 type:user
#3	→	manman4 manman4	8,536	36	39	4,792	Japanexact-country	location:Japan repos:>5 type:user
#4	→	unhappychoice Yuji Ueki	8,246	775	64	3,654	Tokyo, Japanmulti-location	location:Japan repos:>5 type:user
#5	→	tekezo Takayama Fumihiko	8,221	59	38	1,069	Japanexact-country	location:Japan repos:>5 type:user
#6	→	azu azu	5,650	583	1,547	2,837	Tokyo/Japanmulti-location	location:Japan repos:>5 type:user
#7	→	ko1 Koichi Sasada	5,461	82	118	1,210	Tokyo, Japanmulti-location	location:Japan repos:>5 type:user
#8	→	hsbt Hiroshi SHIBATA	5,300	727	324	1,651	Tokyo, Japanmulti-location	location:Japan repos:>5 type:user
#9	→	matz Yukihiro "Matz" Matsumoto	4,983	26	17	10,471	Matsue, Japanmulti-location	location:Japan repos:>5 type:user
#10	↑2	mattn mattn	3,725	567	2,277	13,367	Osaka, Japanmulti-location	location:Japan repos:>5 type:user
#11	↓1	amatsuda Akira Matsuda	3,660	333	252	2,967	Tokyo, Japanmulti-location	location:Japan repos:>5 type:user
#12	↓1	sapphi-red 翠	3,598	1,621	238	1,468	Japanexact-country	location:Japan repos:>5 type:user
#13	→	mumoshu Yusuke Kuoka	3,387	234	338	1,248	Kagawa, Japanmulti-location	location:Japan repos:>5 type:user
#14	→	wkentaro Kentaro Wada	3,011	845	371	2,536	Tokyo, Japanmulti-location	location:Japan repos:>5 type:user
#15	→	PINTO0309 Katsuya Hyodo	2,923	205	447	2,173	Nagoya, Japanmulti-location	location:Japan repos:>5 type:user
#16	→	hoochanlon 123456	2,808	11	31	1,428	Taiwan, Japanmulti-location	location:Japan repos:>5 type:user
#17	→	keijiro Keijiro Takahashi	2,664	7	941	23,715	Japanexact-country	location:Japan repos:>5 type:user
#18	→	gfx FUJI Goro	2,649	1,633	503	1,027	Tokyo, Japanmulti-location	location:Japan repos:>5 type:user
#19	→	kazupon kazuya kawaguchi	2,530	414	374	4,320	Tokyo, Japanmulti-location	location:Japan repos:>5 type:user
#20	→	Jannchie Jianqi Pan	2,302	13	243	1,909	Japan, Tokyo ⇄ China, Shanghaimulti-location	location:Japan repos:>5 type:user

Commit and PR counts are one-year public contribution totals from the official GitHub GraphQL API. When a contributor has an isolated per-user burst that exceeds their adaptive baseline cap, the table ranks on the adjusted commit signal while showing the raw total for audit. Repo and follower counts come from public GitHub profile metadata. Country matching uses free-text GitHub profile location and is not verified geography.

Discovery queries

location:Japan repos:>5 type:user — 100 accepted from 40,227 GitHub matches

Raw JSON snapshot · Methodology