# Kishu Ken breed report 2026 Population-genetics report for Kishu Ken, 2026: 3,107 dogs on file, 421 born in the last 8 years. ## Summary - **Dogs on file:** 3,107 - **Born in the last 8 years:** 421 - **Reference sample:** 421 dogs (seed 2026, 10 generations) - **Computed:** 2026-09-04 ## Inbreeding over time Mean cached COI per birth-year cohort — population means, not individual COIs. Every figure is a floor: COI is capped at a fixed generation depth, so the true mean may be higher. 1075 — ≥ 21.88% (Elevated) · 4.2% complete · 1 dogs 1956 — ≥ 0% (Indicative) · 0.8% complete · 1 dogs 1962 — ≥ 31.25% (Elevated) · 1.2% complete · 2 dogs 1963 — ≥ 4.69% (Indicative) · 1.3% complete · 1 dogs 1964 — ≥ 18.44% (Elevated) · 1.7% complete · 5 dogs 1965 — ≥ 11.53% (Moderate) · 2.3% complete · 4 dogs 1966 — ≥ 16.58% (Elevated) · 3.5% complete · 4 dogs 1967 — ≥ 31.06% (Elevated) · 3% complete · 2 dogs 1968 — ≥ 11.31% (Moderate) · 5.6% complete · 4 dogs 1969 — ≥ 21.93% (Elevated) · 2.8% complete · 5 dogs 1970 — ≥ 8.63% (Moderate) · 5.7% complete · 4 dogs 1971 — ≥ 8.38% (Moderate) · 5.8% complete · 10 dogs 1972 — ≥ 23.39% (Elevated) · 8.6% complete · 2 dogs 1973 — ≥ 17.78% (Elevated) · 7.8% complete · 3 dogs 1974 — ≥ 8.9% (Moderate) · 6.4% complete · 2 dogs 1975 — ≥ 8.45% (Moderate) · 11.3% complete · 9 dogs 1976 — ≥ 6.57% (Moderate) · 10.7% complete · 12 dogs 1977 — ≥ 2.07% (Indicative) · 10% complete · 6 dogs 1978 — ≥ 6.51% (Moderate) · 14.8% complete · 10 dogs 1979 — ≥ 9.1% (Moderate) · 12.3% complete · 5 dogs 1980 — ≥ 9.53% (Moderate) · 12% complete · 16 dogs 1981 — ≥ 11.47% (Moderate) · 16.3% complete · 16 dogs 1982 — ≥ 12.19% (Moderate) · 22.6% complete · 16 dogs 1983 — ≥ 19.03% (Elevated) · 18.9% complete · 15 dogs 1984 — ≥ 14.97% (Elevated) · 25.6% complete · 31 dogs 1985 — ≥ 13.46% (Elevated) · 29.9% complete · 31 dogs 1986 — ≥ 13.58% (Elevated) · 30% complete · 18 dogs 1987 — ≥ 13.74% (Elevated) · 34.9% complete · 22 dogs 1988 — ≥ 20.36% (Elevated) · 47.3% complete · 10 dogs 1989 — ≥ 20.88% (Elevated) · 46.1% complete · 20 dogs 1990 — ≥ 13.81% (Elevated) · 40.6% complete · 14 dogs 1991 — ≥ 18.8% (Elevated) · 43.1% complete · 20 dogs 1992 — ≥ 22.13% (Elevated) · 54.5% complete · 22 dogs 1993 — ≥ 18.61% (Elevated) · 48.5% complete · 16 dogs 1994 — ≥ 16.5% (Elevated) · 57.1% complete · 7 dogs 1995 — ≥ 18.28% (Elevated) · 54.2% complete · 16 dogs 1996 — ≥ 17.61% (Elevated) · 54.9% complete · 19 dogs 1997 — ≥ 21.27% (Elevated) · 64.9% complete · 24 dogs 1998 — ≥ 21.79% (Elevated) · 69.2% complete · 24 dogs 1999 — ≥ 13.74% (Elevated) · 62% complete · 17 dogs 2000 — ≥ 20.41% (Elevated) · 77.2% complete · 21 dogs 2001 — ≥ 23.15% (Elevated) · 81.9% complete · 19 dogs 2002 — ≥ 15.3% (Elevated) · 63.7% complete · 18 dogs 2003 — ≥ 15.6% (Elevated) · 79.1% complete · 16 dogs 2004 — ≥ 20.04% (Elevated) · 73.1% complete · 13 dogs 2005 — ≥ 19.89% (Elevated) · 77.4% complete · 10 dogs 2006 — ≥ 16.66% (Elevated) · 75.4% complete · 19 dogs 2007 — ≥ 16.19% (Elevated) · 80.4% complete · 22 dogs 2008 — ≥ 14.5% (Elevated) · 82.8% complete · 17 dogs 2009 — ≥ 12.68% (Elevated) · 83.1% complete · 19 dogs 2010 — ≥ 12.5% (Elevated) · 72.3% complete · 16 dogs 2011 — ≥ 13.95% (Elevated) · 76.8% complete · 16 dogs 2012 — ≥ 8.2% (Moderate) · 71% complete · 17 dogs 2013 — ≥ 13.11% (Elevated) · 80.4% complete · 35 dogs 2014 — ≥ 11.16% (Moderate) · 81.3% complete · 47 dogs 2015 — ≥ 10.28% (Moderate) · 85.2% complete · 32 dogs 2016 — ≥ 9.2% (Moderate) · 83.8% complete · 42 dogs 2017 — ≥ 11.7% (Moderate) · 88.9% complete · 51 dogs 2018 — ≥ 10.43% (Moderate) · 87.3% complete · 38 dogs 2019 — ≥ 10.92% (Moderate) · 86.9% complete · 71 dogs 2020 — ≥ 16.05% (Elevated) · 85.6% complete · 63 dogs 2021 — ≥ 11.06% (Moderate) · 85.3% complete · 64 dogs 2022 — ≥ 15.01% (Elevated) · 84.6% complete · 69 dogs 2023 — ≥ 5.73% (Indicative) · 89.7% complete · 22 dogs 2024 — ≥ 13.11% (Elevated) · 94.5% complete · 14 dogs 2025 — ≥ 14.33% (Elevated) · 99.7% complete · 5 dogs ## Founders 284 founders in the reference sample's known ancestry; the five most influential carry 6.16% of the known genome. Effective founders (fe): 96.75 — the number of equally contributing founders that would produce the same genetic diversity as the breed's 284 real, unevenly contributing founders. Founder genome equivalents (fg): 9.52 — a lower, more realistic figure that also accounts for genetic material lost to drift over generations; fg is normally lower than fe, never more than the number of founders whose lines still survive. - **恵春号 上州丸二荘:** [1.31% mean contribution](https://nihonken.org/pedigree/dogs/c2f23fab-ea6b-4e27-b53e-e9b86a26327e) - **源山号 舞子荘:** [1.3% mean contribution](https://nihonken.org/pedigree/dogs/9a8ee4d8-7e2d-4cd3-a0d0-e55df7357762) - **Seiichi go Shimoyasu sou:** [1.18% mean contribution](https://nihonken.org/pedigree/dogs/4948ab11-4afe-4339-91cd-984ad77af219) - **Neki no RInhime go Juuichi Garou sou:** [1.18% mean contribution](https://nihonken.org/pedigree/dogs/7d2476fb-f0ea-42bf-aebd-c47fd8c8de5e) - **Shiumme go Yaguchi Nakamura sou:** [1.18% mean contribution](https://nihonken.org/pedigree/dogs/c1c11193-6230-4b68-b76f-cc9b3b7bd980) - **Kenkou go Houren sou:** [1.18% mean contribution](https://nihonken.org/pedigree/dogs/fd8f44f8-39ab-474d-800e-bf52c3142b64) - **赤号 舞子荘:** [1.16% mean contribution](https://nihonken.org/pedigree/dogs/a353c2bf-6cf4-44af-aa0b-41a630e3f29b) - **鉄二号 和気荘:** [0.9% mean contribution](https://nihonken.org/pedigree/dogs/1942a05b-0016-4213-9868-b1fc7778ec2c) - **勝姫号 和歌山下荘:** [0.9% mean contribution](https://nihonken.org/pedigree/dogs/3e41970f-890a-480c-af5c-5ba93f2d8c88) - **早春号 秋葉荘:** [0.9% mean contribution](https://nihonken.org/pedigree/dogs/4d973249-9960-40a2-a8e5-bf766b2d3d8f) - **鉄一号 （和歌山下氏）:** [0.9% mean contribution](https://nihonken.org/pedigree/dogs/aff7d00f-1940-4667-82d3-cf498b355ea7) - **花太刀号 ハ尾荘:** [0.78% mean contribution](https://nihonken.org/pedigree/dogs/71e860ca-02e5-4b8f-8305-4802205cb592) - **仙人の滝号 前橋三山荘:** [0.72% mean contribution](https://nihonken.org/pedigree/dogs/23fee265-8610-41a9-ab55-31028f96510b) - **Chiouen Kensha:** [0.71% mean contribution](https://nihonken.org/pedigree/dogs/ee862409-7d7a-4239-b57b-9a9825d08da3) - **Shirai Shinyuu sou:** [0.67% mean contribution](https://nihonken.org/pedigree/dogs/a54921b2-1f5c-4ff8-9aef-9e7c31b48105) - **Shirai Shinyuu sou:** [0.64% mean contribution](https://nihonken.org/pedigree/dogs/4f15bd12-9b94-484c-b47f-eff3629143fb) - **Shirai Shinyuu sou:** [0.64% mean contribution](https://nihonken.org/pedigree/dogs/909ea5c2-46b1-4285-9b00-7921e24bc5f9) - **Hidaka no Reihou go:** [0.59% mean contribution](https://nihonken.org/pedigree/dogs/0b6acb4b-a53f-4e92-96d4-bae713367dda) - **白秋女号:** [0.59% mean contribution](https://nihonken.org/pedigree/dogs/15ca0c31-391a-4db8-b58c-43c36e160960) - **Shirai Shinyuu sou:** [0.48% mean contribution](https://nihonken.org/pedigree/dogs/f910f02a-d6d5-439e-ba9b-eed4f433e267) ## 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. ## How to cite Nihon Ken Pedigree Database (2026). Kishu Ken breed report 2026. https://nihonken.org/pedigree/breeds/kishu/report/2026. Accessed 2026-10-16. Licensed CC BY 4.0. ## Caveats Every COI figure is a floor: pedigrees are incomplete. 1.8% of the reference dogs' ancestry is unknown and 50.9% lies beyond 10 generations; fe and fg describe the known part. --- **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_