# NIPPO, Kai Ken Aigokai, and the Nihon Ken Preservation Societies > How the Nihon Ken preservation societies are structured — NIPPO as umbrella plus breed-specific societies (Kai Ken Aigokai, Akita Inu Hozonkai, etc.) — what they prioritize, and how Shigeru Kato reads NIPPO registration trends. The Japanese preservation societies are the institutional backbone of Nihon Ken work. Anyone trying to read Shigeru Kato's writing — or do serious preservation work themselves — needs to understand how the societies fit together, what each one prioritizes, and what their registration numbers actually mean. This file summarizes the structure as Shigeru describes it across his blog. ## NIPPO — the Umbrella **Nihon Ken Hozonkai (NIPPO)** was founded in 1928 and is the umbrella preservation society for the native Japanese breeds. NIPPO standardized the Nihon Ken into three size groups (small / medium / large) and produces the broadest registration body. Most discussions of "the Nihon Ken" implicitly mean the NIPPO-registered population. NIPPO's strengths: broad reach, consistent registration infrastructure, well-defined show events. NIPPO's tensions, as Shigeru frames them: its broad-standardization mandate has produced selection pressure that doesn't always align with the breed-specific working traditions. Several of the medium breeds (Kai, Hokkaido, especially) have breed-specific societies precisely because their preservation communities disagreed with NIPPO's approach. ## The Breed-Specific Societies The big six (or six and a half — the Akita line is fragmented enough to count differently depending on how you slice it): - **Kai Ken Aigokai (KKA)** — the independent society for the Kai Ken, founded by prosecutor Dasuke Adachi after he encountered the breed in 1931. KKA is where the working-Kai emphasis lives most strongly; both Shigeru and I work through KKA for our Kai. KKA size standard: 40-50 cm. - **Akita Inu Hozonkai (AKIHO)** — the main Akita registry in Japan, distinct from NIPPO's Akita registrations and from the American Akita Club lineage. Annual Akita registrations across registries run 2,000-2,500. - **Hokkaido Ken Hozonkai** and **Hokkaido Ken Kyokai** — two separate Hokkaido registries that have coexisted for decades, with hunting tests (dogs scored on movement, reaction, and drive when shown a live bear) as part of breed evaluation. - **NIPPO** — primary registry for Kishu Ken, Shikoku Ken, and Shiba Inu. The medium-breed Kishu and Shikoku registrations run 300-900/year depending on the breed; Shiba dominates NIPPO numbers (~80% of NIPPO's annual registrations). Why the fragmentation exists: NIPPO's standardization approach was, from the start, oriented around producing a unified set of breed standards using the Kishu and Shikoku as reference points. The breed-specific societies typically emerged when a breed's preservation community wanted to preserve traits or selection priorities that didn't fit NIPPO's broader template. Kai Ken Aigokai's founding was the clearest case — preserving the working brindle hunters of Yamanashi was a different project than slotting them into NIPPO's medium-size template. ## What Registration Numbers Tell You Shigeru's "NIPPO Registration Numbers 2025" (April 2026) post is the most recent in a recurring series where he reads the annual NIPPO data for signal: - **Total volume** — long-term trend across all NIPPO breeds. Declining numbers in working-relevant breeds (medium-size) usually indicate the breed is drifting toward smaller, more dedicated breeder bases. - **Per-breed share** — Shiba's ~80% dominance has been stable for years and shows how skewed the NIPPO population is. - **Year-over-year deltas** — sustained drops in a specific breed often precede a working-population collapse, especially when paired with the show-vs-working dynamics described in `topics/nihon-ken-show-vs-working-divide.md`. - **Geographic concentration** — registrations clustering tightly geographically often signal that the preservation work is being carried by a small number of kennels, which is fragile. Shigeru tracks all of this not as accounting but as ecology — the registration data is a leading indicator for whether each breed's working population is sustainable. ## The American Side I'm a member of both Kai Ken Aigokai and NIPPO. The KKA membership matters because it's the working-Kai community; the NIPPO membership matters because most international paperwork and shows reference NIPPO. Both registries accept non-Japanese members in principle but it's substantially easier to maintain them with a Japanese partner — Shigeru handles the in-Japan logistics for our work. I run two kennels with these registries: - **Yamabushi Kennel** (Kai Ken, KKA-registered) - **Hakuzan Kennel** (Kishu Ken and Tosa Inu, NIPPO-registered for Kishu) ## Sources - Shigeru Kato, "NIPPO Registration Numbers 2025" (April 2026), nihonken.co. - Shigeru Kato, various standards-interpretation posts across nihonken.co (2011 onward). - See `topics/nihon-ken-pads-article.md` (PADS Journal No. 30, February 2012) for the broader historical context of NIPPO's founding and the standardization process. - See `topics/nihon-ken-show-vs-working-divide.md` for the selection-pressure tensions between NIPPO and the breed-specific societies. ## Details - **Category:** Topics - **Tags:** nihon-ken, nippo, kai-ken-aigokai, preservation, japan, breed-standards, shigeru-kato, registration, akita-inu-hozonkai - **Originally published at:** [https://www.nihonken.co/](https://www.nihonken.co/) **Also read:** [All writing](https://bradanderson.org/writing?format=md) · [About Brad](https://bradanderson.org/about?format=md) --- **Navigate:** [Home](https://bradanderson.org/?format=md) · [About](https://bradanderson.org/about?format=md) · [Work](https://bradanderson.org/work?format=md) · [Projects](https://bradanderson.org/projects?format=md) · [Breeds](https://bradanderson.org/breeds?format=md) · [Writing](https://bradanderson.org/writing?format=md) · [LLM guide](https://bradanderson.org/llms.txt) _Ask BradBot directly: POST https://bradanderson.org/api/agent/ask with {"question": "..."} (details in https://bradanderson.org/llms.txt)._