# Shiba Inu breed report 2026 Population-genetics report for Shiba Inu, 2026: 7,592 dogs on file, 574 born in the last 8 years. ## Summary - **Dogs on file:** 7,592 - **Born in the last 8 years:** 574 - **Reference sample:** 500 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. 1953 — ≥ 42.19% (Elevated) · 2.3% complete · 1 dogs 1964 — ≥ 20.34% (Elevated) · 10.4% complete · 1 dogs 1969 — ≥ 12.82% (Elevated) · 17.3% complete · 2 dogs 1970 — ≥ 40.62% (Elevated) · 24.7% complete · 1 dogs 1972 — ≥ 3.48% (Indicative) · 26% complete · 1 dogs 1973 — ≥ 12.5% (Elevated) · 9.4% complete · 1 dogs 1975 — ≥ 6.74% (Moderate) · 13.9% complete · 1 dogs 1976 — ≥ 30.34% (Elevated) · 27.1% complete · 1 dogs 1977 — ≥ 13.67% (Elevated) · 27.1% complete · 1 dogs 1979 — ≥ 4.81% (Indicative) · 13% complete · 1 dogs 1980 — ≥ 0.27% (Indicative) · 11.1% complete · 2 dogs 1981 — ≥ 1.67% (Indicative) · 15.1% complete · 5 dogs 1982 — ≥ 7.86% (Moderate) · 7.4% complete · 6 dogs 1983 — ≥ 13.49% (Elevated) · 16.8% complete · 2 dogs 1984 — ≥ 4.05% (Indicative) · 12.9% complete · 13 dogs 1985 — ≥ 1.62% (Indicative) · 12.2% complete · 17 dogs 1986 — ≥ 3.48% (Indicative) · 12.8% complete · 21 dogs 1987 — ≥ 3.19% (Indicative) · 11.9% complete · 26 dogs 1988 — ≥ 3.57% (Indicative) · 10.7% complete · 24 dogs 1989 — ≥ 3.11% (Indicative) · 12.5% complete · 36 dogs 1990 — ≥ 4.57% (Indicative) · 11.4% complete · 45 dogs 1991 — ≥ 3.11% (Indicative) · 12.3% complete · 42 dogs 1992 — ≥ 2.77% (Indicative) · 15.6% complete · 59 dogs 1993 — ≥ 2.67% (Indicative) · 15.6% complete · 61 dogs 1994 — ≥ 3.59% (Indicative) · 17.8% complete · 76 dogs 1995 — ≥ 2.67% (Indicative) · 19.6% complete · 59 dogs 1996 — ≥ 2.9% (Indicative) · 20.5% complete · 62 dogs 1997 — ≥ 2.02% (Indicative) · 21.9% complete · 75 dogs 1998 — ≥ 2.32% (Indicative) · 18.6% complete · 56 dogs 1999 — ≥ 3.02% (Indicative) · 23.3% complete · 61 dogs 2000 — ≥ 3.48% (Indicative) · 22.5% complete · 57 dogs 2001 — ≥ 2.48% (Indicative) · 23.2% complete · 52 dogs 2002 — ≥ 3.56% (Indicative) · 22.8% complete · 58 dogs 2003 — ≥ 1.65% (Indicative) · 21.9% complete · 86 dogs 2004 — ≥ 2.26% (Indicative) · 20.2% complete · 56 dogs 2005 — ≥ 1.74% (Indicative) · 26.5% complete · 70 dogs 2006 — ≥ 2.2% (Indicative) · 24.9% complete · 72 dogs 2007 — ≥ 2.33% (Indicative) · 25.5% complete · 54 dogs 2008 — ≥ 2.83% (Indicative) · 26.3% complete · 70 dogs 2009 — ≥ 3.55% (Indicative) · 28.1% complete · 51 dogs 2010 — ≥ 2.07% (Indicative) · 29.5% complete · 70 dogs 2011 — ≥ 2.39% (Indicative) · 30.4% complete · 67 dogs 2012 — ≥ 3.11% (Indicative) · 29.8% complete · 73 dogs 2013 — ≥ 4.23% (Indicative) · 32.8% complete · 71 dogs 2014 — ≥ 3.7% (Indicative) · 32.6% complete · 72 dogs 2015 — ≥ 4.46% (Indicative) · 33.8% complete · 59 dogs 2016 — ≥ 2.97% (Indicative) · 34.4% complete · 67 dogs 2017 — ≥ 2.49% (Indicative) · 34.8% complete · 61 dogs 2018 — ≥ 3.9% (Indicative) · 37.4% complete · 61 dogs 2019 — ≥ 3.48% (Indicative) · 37.9% complete · 53 dogs 2020 — ≥ 2.13% (Indicative) · 40.4% complete · 53 dogs 2021 — ≥ 1.96% (Indicative) · 42.5% complete · 96 dogs 2022 — ≥ 2.67% (Indicative) · 42.1% complete · 70 dogs 2023 — ≥ 2.59% (Indicative) · 45.7% complete · 38 dogs 2024 — ≥ 2.09% (Indicative) · 46.8% complete · 62 dogs 2025 — ≥ 2.64% (Indicative) · 48.1% complete · 39 dogs 2026 — ≥ 1.15% (Indicative) · 56.3% complete · 12 dogs ## Founders 1447 founders in the reference sample's known ancestry; the five most influential carry 3.23% of the known genome. Effective founders (fe): 545.01 — the number of equally contributing founders that would produce the same genetic diversity as the breed's 1447 real, unevenly contributing founders. Founder genome equivalents (fg): 77.21 — 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. - **Mihouhime (Mitoyohime) Go Fudougataki Kensha:** [0.71% mean contribution](https://nihonken.org/pedigree/dogs/23884a45-8012-4e71-b7ac-517396be3ef9) - **Kibi No Suzumi Go Kibi Ogura sou:** [0.68% mean contribution](https://nihonken.org/pedigree/dogs/7d68b30f-f7b5-45c5-b282-8c8da03eaef6) - **Aoihidehime go Hyougo Koumyousou:** [0.62% mean contribution](https://nihonken.org/pedigree/dogs/70d062fc-11f7-4aed-9c55-7b5de7bc4414) - **Gokou No Rinka Go Shirakayasou:** [0.62% mean contribution](https://nihonken.org/pedigree/dogs/0c809af3-d07d-469c-88a0-a347f84e49cb) - **Iva Moriko:** [0.6% mean contribution](https://nihonken.org/pedigree/dogs/80ad5207-d4d5-4129-b408-f39d314f0d29) - **Fukuhime Go Mikawa Toyohashisou:** [0.57% mean contribution](https://nihonken.org/pedigree/dogs/855a7cf7-0190-4d18-b385-a9d85e2721a2) - **Magic Touch Incipita Vita:** [0.5% mean contribution](https://nihonken.org/pedigree/dogs/e274d6ef-f4f6-4f06-adae-9f9cb0d5fe4c) - **Ginga Go Shirokurasou:** [0.45% mean contribution](https://nihonken.org/pedigree/dogs/355c09c5-5881-4fd9-a405-94e6baa92d02) - **Chiaki Go Matsuhanaesou:** [0.45% mean contribution](https://nihonken.org/pedigree/dogs/f6e770b7-d7c3-4904-bb1a-2c51bda9635a) - **Midori No Genkou Go Daini Aominesou:** [0.44% mean contribution](https://nihonken.org/pedigree/dogs/b681a64f-66e8-4425-9d44-0b6053334431) - **Goufuume Go Takamitsusou:** [0.42% mean contribution](https://nihonken.org/pedigree/dogs/435fb0e3-8e30-4bf4-a6d8-40ff8ac27a50) - **Shinobu Go Daishizen:** [0.37% mean contribution](https://nihonken.org/pedigree/dogs/61eea40f-d998-4931-acdb-96285c08cac1) - **Matsuurame Go Fudougataki Kensha:** [0.34% mean contribution](https://nihonken.org/pedigree/dogs/8f1233e9-d184-49f3-a2b2-0b484f324dad) - **Natsumari Go Tosa Machidasou:** [0.33% mean contribution](https://nihonken.org/pedigree/dogs/534711c1-ae43-4576-a082-345ed2f7b497) - **Seto No Tenryuu Go Tsurajima Yabe:** [0.33% mean contribution](https://nihonken.org/pedigree/dogs/66e77f55-76f2-4cf3-884f-7ec3570d69bf) - **Ouka Go Kagiyasou:** [0.33% mean contribution](https://nihonken.org/pedigree/dogs/3c7878e8-1f41-4cb4-b5f0-14341a3b25a3) - **Benimaru Go Kikokusou:** [0.32% mean contribution](https://nihonken.org/pedigree/dogs/142764b4-7150-4d4f-89fb-89811d8d236e) - **Asuka Go Nanjou Ichinose:** [0.32% mean contribution](https://nihonken.org/pedigree/dogs/ee9f79b3-78f9-4b41-a8f6-fe297040a39d) - **Yanaseryuu Go Mishima Suzukisou:** [0.32% mean contribution](https://nihonken.org/pedigree/dogs/8bbfca2c-482b-47ec-9716-310d55bc8099) - **Kokuryuuhime Go Bingo Kashimasou:** [0.32% mean contribution](https://nihonken.org/pedigree/dogs/b39de56f-62a5-4c5d-bb01-dc987a0b4592) ## 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). Shiba Inu breed report 2026. https://nihonken.org/pedigree/breeds/shiba/report/2026. Accessed 2026-10-17. Licensed CC BY 4.0. ## Caveats Every COI figure is a floor: pedigrees are incomplete. 7.9% of the reference dogs' ancestry is unknown and 3.4% lies beyond 10 generations; fe and fg describe the known part. The reference sample is 500 of 574 dogs born since 2018. --- **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_