{
  "kind": "country",
  "slug": "japan",
  "name": "Japan",
  "title": "Top observed GitHub contributors in Japan",
  "generated_at": "2026-07-03T00:00:45.645Z",
  "fresh_until": "2026-07-10T00:00:45.645Z",
  "status": "fresh",
  "method": "github-graphql-one-year-contribution-activity",
  "source_run": "2026-07-03",
  "history": {
    "weeks": [
      "2026-07-03"
    ],
    "ranked_items": [
      20
    ],
    "top_10_signal": [
      77325
    ]
  },
  "code": "JP",
  "candidate_count": 40227,
  "caveats": [
    "Live data uses GitHub GraphQL contribution and public profile fields; it is an observed sample, not a complete census.",
    "Location matching uses free-text GitHub profile locations and must not be treated as verified nationality or residence.",
    "Contributor pages expose public repository counts plus one-year GitHub contribution activity from GraphQL. These are not all-time totals and may differ from private contribution graphs.",
    "The OSSRank score is retained only as a combined proxy; raw commits, pull requests, and repository tables are preferred for review and SEO pages."
  ],
  "discovery_queries": [
    "location:Japan repos:>5 type:user"
  ],
  "candidate_count_by_query": [
    {
      "query": "location:Japan repos:>5 type:user",
      "total": 40227,
      "accepted": 100
    }
  ],
  "entries": [
    {
      "login": "mizchi",
      "name": "Kotaro Chikuba",
      "profile_url": "https://github.com/mizchi",
      "public_contributions": 15704,
      "public_repos": 642,
      "public_gists": 764,
      "observed_public_commits": 15704,
      "observed_public_pull_requests": 1674,
      "followers": 1832,
      "location": "Tokyo/Japan",
      "location_confidence": "multi-location",
      "discovered_by_query": "location:Japan repos:>5 type:user",
      "notable_repositories": [],
      "rank": 1,
      "previous_rank": 1
    },
    {
      "login": "tokuhirom",
      "name": "Tokuhiro Matsuno",
      "profile_url": "https://github.com/tokuhirom",
      "public_contributions": 11499,
      "public_repos": 989,
      "public_gists": 174,
      "observed_public_commits": 11499,
      "observed_public_pull_requests": 5637,
      "followers": 1038,
      "location": "Tokyo, Japan",
      "location_confidence": "multi-location",
      "discovered_by_query": "location:Japan repos:>5 type:user",
      "notable_repositories": [],
      "rank": 2,
      "previous_rank": 2
    },
    {
      "login": "manman4",
      "name": "manman4",
      "profile_url": "https://github.com/manman4",
      "public_contributions": 8536,
      "public_repos": 39,
      "public_gists": 0,
      "observed_public_commits": 8536,
      "observed_public_pull_requests": 36,
      "followers": 4792,
      "location": "Japan",
      "location_confidence": "exact-country",
      "discovered_by_query": "location:Japan repos:>5 type:user",
      "notable_repositories": [],
      "rank": 3,
      "previous_rank": 3
    },
    {
      "login": "unhappychoice",
      "name": "Yuji Ueki",
      "profile_url": "https://github.com/unhappychoice",
      "public_contributions": 8246,
      "public_repos": 64,
      "public_gists": 12,
      "observed_public_commits": 8246,
      "observed_public_pull_requests": 775,
      "followers": 3654,
      "location": "Tokyo, Japan",
      "location_confidence": "multi-location",
      "discovered_by_query": "location:Japan repos:>5 type:user",
      "notable_repositories": [],
      "rank": 4,
      "previous_rank": 4
    },
    {
      "login": "tekezo",
      "name": "Takayama Fumihiko",
      "profile_url": "https://github.com/tekezo",
      "public_contributions": 8221,
      "public_repos": 38,
      "public_gists": 9,
      "observed_public_commits": 8221,
      "observed_public_pull_requests": 59,
      "followers": 1069,
      "location": "Japan",
      "location_confidence": "exact-country",
      "discovered_by_query": "location:Japan repos:>5 type:user",
      "notable_repositories": [],
      "rank": 5,
      "previous_rank": 5
    },
    {
      "login": "azu",
      "name": "azu",
      "profile_url": "https://github.com/azu",
      "public_contributions": 5650,
      "public_repos": 1547,
      "public_gists": 987,
      "observed_public_commits": 5650,
      "observed_public_pull_requests": 583,
      "followers": 2837,
      "location": "Tokyo/Japan",
      "location_confidence": "multi-location",
      "discovered_by_query": "location:Japan repos:>5 type:user",
      "notable_repositories": [],
      "rank": 6,
      "previous_rank": 6
    },
    {
      "login": "ko1",
      "name": "Koichi Sasada",
      "profile_url": "https://github.com/ko1",
      "public_contributions": 5461,
      "public_repos": 118,
      "public_gists": 0,
      "observed_public_commits": 5461,
      "observed_public_pull_requests": 82,
      "followers": 1210,
      "location": "Tokyo, Japan",
      "location_confidence": "multi-location",
      "discovered_by_query": "location:Japan repos:>5 type:user",
      "notable_repositories": [],
      "rank": 7,
      "previous_rank": 7
    },
    {
      "login": "hsbt",
      "name": "Hiroshi SHIBATA",
      "profile_url": "https://github.com/hsbt",
      "public_contributions": 5300,
      "public_repos": 324,
      "public_gists": 253,
      "observed_public_commits": 5300,
      "observed_public_pull_requests": 727,
      "followers": 1651,
      "location": "Tokyo, Japan",
      "location_confidence": "multi-location",
      "discovered_by_query": "location:Japan repos:>5 type:user",
      "notable_repositories": [],
      "rank": 8,
      "previous_rank": 8
    },
    {
      "login": "matz",
      "name": "Yukihiro \"Matz\" Matsumoto",
      "profile_url": "https://github.com/matz",
      "public_contributions": 4983,
      "public_repos": 17,
      "public_gists": 6,
      "observed_public_commits": 4983,
      "observed_public_pull_requests": 26,
      "followers": 10471,
      "location": "Matsue, Japan",
      "location_confidence": "multi-location",
      "discovered_by_query": "location:Japan repos:>5 type:user",
      "notable_repositories": [],
      "rank": 9,
      "previous_rank": 9
    },
    {
      "login": "mattn",
      "name": "mattn",
      "profile_url": "https://github.com/mattn",
      "public_contributions": 3725,
      "public_repos": 2277,
      "public_gists": 1944,
      "observed_public_commits": 3725,
      "observed_public_pull_requests": 567,
      "followers": 13367,
      "location": "Osaka, Japan",
      "location_confidence": "multi-location",
      "discovered_by_query": "location:Japan repos:>5 type:user",
      "notable_repositories": [],
      "rank": 10,
      "previous_rank": 12
    },
    {
      "login": "amatsuda",
      "name": "Akira Matsuda",
      "profile_url": "https://github.com/amatsuda",
      "public_contributions": 3660,
      "public_repos": 252,
      "public_gists": 47,
      "observed_public_commits": 3660,
      "observed_public_pull_requests": 333,
      "followers": 2967,
      "location": "Tokyo, Japan",
      "location_confidence": "multi-location",
      "discovered_by_query": "location:Japan repos:>5 type:user",
      "notable_repositories": [],
      "rank": 11,
      "previous_rank": 10
    },
    {
      "login": "sapphi-red",
      "name": "翠",
      "profile_url": "https://github.com/sapphi-red",
      "public_contributions": 3598,
      "public_repos": 238,
      "public_gists": 11,
      "observed_public_commits": 3598,
      "observed_public_pull_requests": 1621,
      "followers": 1468,
      "location": "Japan",
      "location_confidence": "exact-country",
      "discovered_by_query": "location:Japan repos:>5 type:user",
      "notable_repositories": [],
      "rank": 12,
      "previous_rank": 11
    },
    {
      "login": "mumoshu",
      "name": "Yusuke Kuoka",
      "profile_url": "https://github.com/mumoshu",
      "public_contributions": 3387,
      "public_repos": 338,
      "public_gists": 181,
      "observed_public_commits": 3387,
      "observed_public_pull_requests": 234,
      "followers": 1248,
      "location": "Kagawa, Japan",
      "location_confidence": "multi-location",
      "discovered_by_query": "location:Japan repos:>5 type:user",
      "notable_repositories": [],
      "rank": 13,
      "previous_rank": 13
    },
    {
      "login": "wkentaro",
      "name": "Kentaro Wada",
      "profile_url": "https://github.com/wkentaro",
      "public_contributions": 3011,
      "public_repos": 371,
      "public_gists": 156,
      "observed_public_commits": 3011,
      "observed_public_pull_requests": 845,
      "followers": 2536,
      "location": "Tokyo, Japan",
      "location_confidence": "multi-location",
      "discovered_by_query": "location:Japan repos:>5 type:user",
      "notable_repositories": [],
      "rank": 14,
      "previous_rank": 14
    },
    {
      "login": "PINTO0309",
      "name": "Katsuya Hyodo",
      "profile_url": "https://github.com/PINTO0309",
      "public_contributions": 2923,
      "public_repos": 447,
      "public_gists": 0,
      "observed_public_commits": 2923,
      "observed_public_pull_requests": 205,
      "followers": 2173,
      "location": "Nagoya, Japan",
      "location_confidence": "multi-location",
      "discovered_by_query": "location:Japan repos:>5 type:user",
      "notable_repositories": [],
      "rank": 15,
      "previous_rank": 15
    },
    {
      "login": "hoochanlon",
      "name": "123456",
      "profile_url": "https://github.com/hoochanlon",
      "public_contributions": 2808,
      "public_repos": 31,
      "public_gists": 0,
      "observed_public_commits": 2808,
      "observed_public_pull_requests": 11,
      "followers": 1428,
      "location": "Taiwan, Japan",
      "location_confidence": "multi-location",
      "discovered_by_query": "location:Japan repos:>5 type:user",
      "notable_repositories": [],
      "rank": 16,
      "previous_rank": 16
    },
    {
      "login": "keijiro",
      "name": "Keijiro Takahashi",
      "profile_url": "https://github.com/keijiro",
      "public_contributions": 2664,
      "public_repos": 941,
      "public_gists": 215,
      "observed_public_commits": 2664,
      "observed_public_pull_requests": 7,
      "followers": 23715,
      "location": "Japan",
      "location_confidence": "exact-country",
      "discovered_by_query": "location:Japan repos:>5 type:user",
      "notable_repositories": [],
      "rank": 17,
      "previous_rank": 17
    },
    {
      "login": "gfx",
      "name": "FUJI Goro",
      "profile_url": "https://github.com/gfx",
      "public_contributions": 2649,
      "public_repos": 503,
      "public_gists": 230,
      "observed_public_commits": 2649,
      "observed_public_pull_requests": 1633,
      "followers": 1027,
      "location": "Tokyo, Japan",
      "location_confidence": "multi-location",
      "discovered_by_query": "location:Japan repos:>5 type:user",
      "notable_repositories": [],
      "rank": 18,
      "previous_rank": 18
    },
    {
      "login": "kazupon",
      "name": "kazuya kawaguchi",
      "profile_url": "https://github.com/kazupon",
      "public_contributions": 2530,
      "public_repos": 374,
      "public_gists": 34,
      "observed_public_commits": 2530,
      "observed_public_pull_requests": 414,
      "followers": 4320,
      "location": "Tokyo, Japan",
      "location_confidence": "multi-location",
      "discovered_by_query": "location:Japan repos:>5 type:user",
      "notable_repositories": [],
      "rank": 19,
      "previous_rank": 19
    },
    {
      "login": "Jannchie",
      "name": "Jianqi Pan",
      "profile_url": "https://github.com/Jannchie",
      "public_contributions": 2302,
      "public_repos": 243,
      "public_gists": 3,
      "observed_public_commits": 2302,
      "observed_public_pull_requests": 13,
      "followers": 1909,
      "location": "Japan, Tokyo ⇄ China, Shanghai",
      "location_confidence": "multi-location",
      "discovered_by_query": "location:Japan repos:>5 type:user",
      "notable_repositories": [],
      "rank": 20,
      "previous_rank": 20
    }
  ]
}