# Hokkaido Ken (北海道犬)

Nihon Ken — Hokkaido Ken. Breed health: 775 dogs, 211 founders, gene diversity 99.18%.

See all Hokkaido Ken: https://nihonken.org/pedigree/browse?breed=hokkaido&format=md

## Overview
A free population-genetics overview across the 775 Hokkaido Ken in the database — gene diversity, inbreeding over time, and the ancestors shaping the lines. Every figure is a floor on incomplete pedigrees: true values may be higher.

## Genetic diversity
- **Dogs:** 775
- **Founders:** 211
- **Gene diversity:** 99.18%
- **Mean kinship:** 0.82% · sampled estimate
- **Effective population (Ne):** Not estimable — Mean inbreeding is not rising in the data (ΔF ≤ 0), so Ne is not estimable. Pedigree-based estimate from the rate of inbreeding, not a census Ne; a floor given incomplete pedigrees.

## Inbreeding over time
Mean cached COI per birth-year cohort (446 dogs with a computed COI). Population means, not individual COIs.

1986 — 6.25% (3 dogs)
1994 — 0.00% (1 dogs)
1995 — 12.50% (3 dogs)
1997 — 15.63% (3 dogs)
1998 — 0.00% (1 dogs)
1999 — 0.00% (3 dogs)
2000 — 15.63% (5 dogs)
2001 — 10.42% (6 dogs)
2002 — 10.94% (6 dogs)
2003 — 5.40% (11 dogs)
2004 — 14.85% (6 dogs)
2005 — 7.50% (5 dogs)
2006 — 2.61% (6 dogs)
2007 — 19.01% (6 dogs)
2008 — 1.96% (2 dogs)
2009 — 16.30% (7 dogs)
2010 — 6.25% (7 dogs)
2011 — 0.00% (6 dogs)
2012 — 0.00% (3 dogs)
2013 — 2.89% (10 dogs)
2014 — 0.26% (6 dogs)
2015 — 7.47% (19 dogs)
2016 — 0.12% (13 dogs)
2017 — 2.21% (28 dogs)
2018 — 6.72% (29 dogs)
2019 — 2.07% (30 dogs)
2020 — 0.40% (18 dogs)
2021 — 1.23% (23 dogs)
2022 — 0.41% (11 dogs)
2023 — 0.94% (4 dogs)
2024 — 0.00% (2 dogs)
2025 — 0.02% (1 dogs)

## Most influential dogs
Effective number of ancestors: 27.4. The modern Hokkaido Ken gene pool is as concentrated as if 27.4 equally used dogs had produced it. It is measured on the 93.5% of the gene pool that passes through a recorded ancestor. Ranked by each dog's own contribution to the 217 Hokkaido Ken born since 2011 with a recorded pedigree (as of 2026-10-13): the part of the modern gene pool that passes through that dog and through no dog ranked above it. The top 20 account for 68.6% of it. A dog's reach, the share of pedigrees it appears in, is a minimum: a pedigree that stops early can hide descent, never invent it. Own contributions and the effective number of ancestors are estimates from the recorded pedigrees, and can move either way as more ancestry is recorded.
- **#1:** [Itadaki No Hatsuhime Go (2014) · own contribution 7.6% · in 19.8% of pedigrees](https://nihonken.org/pedigree/dogs/d6df0dbd-4c91-4e5c-8bb3-2f83aa8492cb)
- **#2:** [Nidai Hakuyuu Howasou · own contribution 7.2% · in 48.4% of pedigrees](https://nihonken.org/pedigree/dogs/2b319ef9-90c1-4292-80a5-6ce2e356a288)
- **#3:** [Koujin Pinneshiri Sugiyama Kensha (2005) · own contribution 6.1% · in 27.2% of pedigrees](https://nihonken.org/pedigree/dogs/ebeef471-334d-45db-946a-d9c5759a54f5)
- **#4:** [Ezo Hakuryuu Iwamizawa Yakata · own contribution 5.4% · in 25.8% of pedigrees](https://nihonken.org/pedigree/dogs/269ec0e9-ca8b-4ba3-b0de-f5aee101f47d)
- **#5:** [Hokkaihime Howasou · own contribution 4.7% · in 46.1% of pedigrees](https://nihonken.org/pedigree/dogs/fcbfff8a-ade3-4913-9e7d-7fe9efe42343)
- **#6:** [Ruri Hiroo Hokushinsou (2015) · own contribution 3.7% · in 7.8% of pedigrees](https://nihonken.org/pedigree/dogs/0b3be7bc-bfe4-4e91-9963-69d87aefdada)
- **#7:** [Sanjuukyuu Tenzan Hokkaidou Sano · own contribution 3.5% · in 39.2% of pedigrees](https://nihonken.org/pedigree/dogs/5020e9e0-6b53-4fdb-bec1-259937f23420)
- **#8:** [Maruto Hokkai Komatsu (2013) · own contribution 3% · in 28.6% of pedigrees](https://nihonken.org/pedigree/dogs/0323fcc9-64a8-4efa-9d2a-cdfd44d67d94)
- **#9:** [Yukiko Howasou (2014) · own contribution 3% · in 18% of pedigrees](https://nihonken.org/pedigree/dogs/15024a23-e38d-47e5-a828-c08d99cbd0c1)
- **#10:** [Chitose Washi Kitami Hokuryuusou (2010) · own contribution 2.9% · in 6.9% of pedigrees](https://nihonken.org/pedigree/dogs/0c403dea-6f30-4e9e-93e4-bb0dc3700115)
- **#11:** [Kibou Hakugetsu (2010) · own contribution 2.5% · in 6% of pedigrees](https://nihonken.org/pedigree/dogs/931f00f1-5b5d-48a7-bb7e-8429d8e0281b)
- **#12:** [Bamatsu of Nagaregumo (2006) · own contribution 2.5% · in 11.5% of pedigrees](https://nihonken.org/pedigree/dogs/7bb51f42-f449-4fed-8550-8a0a6619a9b4)
- **#13:** [Junchitosedaiki Oosaka Nishikawa (2016) · own contribution 2.4% · in 5.5% of pedigrees](https://nihonken.org/pedigree/dogs/cfc818fb-02b8-4b8e-ac89-27c057958371)
- **#14:** [Hokuou Minamiuonuma Hanabusasou · own contribution 2.4% · in 8.8% of pedigrees](https://nihonken.org/pedigree/dogs/e4c4df81-2b71-4958-b94f-13d8b8dbac1d)
- **#15:** [Ura Hiroo Hokushinsou (2014) · own contribution 2.3% · in 10.6% of pedigrees](https://nihonken.org/pedigree/dogs/a89bf383-34a6-4240-81d3-7e64ab4e7138)
- **#16:** [Ezo Aku Mutsu Hokujou Souma · own contribution 2% · in 28.6% of pedigrees](https://nihonken.org/pedigree/dogs/1ab08878-c2cb-419e-b8c1-0afc6023e770)
- **#17:** [Ryuuzan Mukawa Mikami · own contribution 2% · in 9.7% of pedigrees](https://nihonken.org/pedigree/dogs/9e9aef98-6044-4fa6-82b5-4cdf1d676e4b)
- **#18:** [Dainikorou Kurohikage Takahashi (2013) · own contribution 1.9% · in 6.9% of pedigrees](https://nihonken.org/pedigree/dogs/1e8b15e6-82c4-40b4-a471-b46fe1f84685)
- **#19:** [Yamaguchi Yukihime Ni Hokusetsu Yamaguchi (2013) · own contribution 1.9% · in 6.9% of pedigrees](https://nihonken.org/pedigree/dogs/46f68f27-04c6-4464-8b70-460357dcc58f)
- **#20:** [Ryouhime Eimeisou · own contribution 1.7% · in 39.2% of pedigrees](https://nihonken.org/pedigree/dogs/71b4c66c-d4b9-480f-a4ca-f9544e7fdc1f)

## Dogs
- **Orochi-Mochi Riona Centrum:** [](https://nihonken.org/pedigree/dogs/167c36cc-1ae7-4a10-9cc8-2c7433156f93)
- **Shirakamiryu Noshiro Katoso 白神龍:** [DOKENHO 138549](https://nihonken.org/pedigree/dogs/bd10712c-1f27-4560-8ad0-54cbc49647e0)
- **Bonki Bezdrevská perla:** [](https://nihonken.org/pedigree/dogs/80d69336-417f-40b9-a385-8a28a16a9939)
- **Ezo Hakuryuu Iwamizawa Yakata エゾ伯龍 岩見沢やかた:** [DOKENHO 135947](https://nihonken.org/pedigree/dogs/269ec0e9-ca8b-4ba3-b0de-f5aee101f47d)
- **Fuuga Oosaka Fujitakasou 楓牙 ・ 大阪藤鷹荘:** [DOKENHO 134098](https://nihonken.org/pedigree/dogs/d0c81707-1bb8-4bcc-a2c8-a3cf28ced1ab)
- **Hokuou Minamiuonuma Hanabusasou 北旺 南魚沼英荘:** [](https://nihonken.org/pedigree/dogs/e4c4df81-2b71-4958-b94f-13d8b8dbac1d)
- **Hotaru Osaka Nishikawa 蛍 大阪西川:** [DOKENHO 139584](https://nihonken.org/pedigree/dogs/5a9736b4-0a81-400a-a5b2-b90575e80f4d)
- **Mizuki Horakuma Sugai:** [DOKENHO 138192](https://nihonken.org/pedigree/dogs/4c6d7344-5312-40f9-93d5-e10d023acd9b)
- **Rera Honomiso レラ 種実荘:** [DOKENHO 139241](https://nihonken.org/pedigree/dogs/c16fde73-e97c-4818-a1f0-fd3686c8c21c)
- **Ryujin Wakkanai Takekataso 龍臣 稚內武方荘:** [DOKENHO 138097](https://nihonken.org/pedigree/dogs/c4347e4a-4080-488a-b9ed-ee52dfd49049)
- **Tenhou Howasou 天宝 穂和荘:** [DOKENHO 138188](https://nihonken.org/pedigree/dogs/85641c00-7b5b-4638-918a-52dd8e9eaa8e)
- **Tenichihime Hokkai Ryouyuusou 天一姫 北海猟雄荘:** [](https://nihonken.org/pedigree/dogs/339a3513-32d3-4643-992c-8fe4d277bdfc)
- **Toboetsuki go Mimi wo Sumaseba:** [](https://nihonken.org/pedigree/dogs/f409cf63-d43b-4143-8c31-6edbfa44784f)
- **Kina Yokohama Michi Inukaisakurasou 希奈 横浜道犬海桜荘:** [DOKENHO 139581](https://nihonken.org/pedigree/dogs/fa53bdbb-9c4c-4a52-8572-a288df53dec0)
- **Ran Yokohama Michi Inukaisakurasou 蘭 横浜道犬海桜荘:** [](https://nihonken.org/pedigree/dogs/efd1f10f-ffba-429f-8fa5-5bd72dbe0c81)
- **Chitose Shirafuji Kitami Hokuryuusou 北見北龍荘:** [DOKENHO 134415](https://nihonken.org/pedigree/dogs/39849a8b-b693-45d1-8c62-a2f2a268a2b5)
- **Ryouta Eimeisou 涼太:** [](https://nihonken.org/pedigree/dogs/2c6b0a5c-fb4a-4fd4-aed8-38e45ed3a250)
- **Terumomo Sakae Demurasou 輝桃:** [DOKENHO 134186](https://nihonken.org/pedigree/dogs/97f5e4a9-c1d9-4f16-b9fc-329f68c9f663)
- **Aikahime Asahikawa Katagiri:** [DOKENHO 129252](https://nihonken.org/pedigree/dogs/d81138a3-7f12-42c8-8867-43d920d21c29)
- **Akane Tomikawa Toyota:** [DOKENHO 133848](https://nihonken.org/pedigree/dogs/ab73d12d-5a6a-4778-b929-f33c0554e66b)
- **Akasatohime Shishidosou:** [](https://nihonken.org/pedigree/dogs/769137fd-659e-477c-8142-7a684ca8adf5)
- **Akeba Otaru Oota:** [DOKENHO 134818](https://nihonken.org/pedigree/dogs/8e6cfbc4-73cf-4199-b93f-d140b7b22b35)
- **Aketora IshiKari Shibata 朱虎・ 石狩柴田:** [](https://nihonken.org/pedigree/dogs/dfb7947c-98e1-4d7f-83c8-ab5d03fd485c)
- **Akihime Sapporo Touhachi 札幌東八:** [DOKENHO 131727](https://nihonken.org/pedigree/dogs/c28b34fa-3656-4be3-80f3-e77ec3c37db7)

---

**Navigate:** [Home](https://nihonken.org/pedigree/?format=md) · [Search](https://nihonken.org/pedigree/browse?format=md) · [Litters](https://nihonken.org/pedigree/litters?format=md) · [Breeders](https://nihonken.org/pedigree/breeders?format=md) · [LLM guide](https://nihonken.org/pedigree/llms.txt)

_Search by name: https://nihonken.org/pedigree/browse?q=NAME&format=md_