A Rule Partly Reversed.
A Court Petition Settled.
The Categories Remain.

JAPAN Rugby League One did not abandon its planned restrictions on August 28. It narrowed them. Two new transitional routes into the unrestricted A-1 category will protect specified existing and grandfathered players when the league divides its present Category A in the 2026–27 season.

The first route covers players retained under provisions inherited from earlier registration systems. The second covers players registered in Category A through 2025–26 who had acquired Japanese nationality by May 31, 2025, including those who applied by that date and acquired it later.

The change followed negotiations over a petition by some players for a provisional injunction at the Tokyo District Court. League One said a settlement was reached on August 27 and that the court petition and a filing with the Japan Fair Trade Commission were withdrawn.

A Partial Reversal, Not a Full Retreat

The system announced in May 2025 divided the current unrestricted Category A into A-1 and A-2. A-1 functions as the league’s homegrown-oriented group and receives mandatory minimums on match day. A-2 players remain eligible for team registration, but their use in a match is constrained by the A-1 floors and overlapping limits with Categories B and C.

The original design would have shifted some players who had been treated as unrestricted because of naturalization or other historical exceptions into A-2. On April 30, League One acknowledged that the change would affect some players but said it did not plan to reconsider the system itself.

The August decision reverses that treatment for the transition group. League One said continuity mattered because players had relied on nationality acquisition and other requirements previously presented as routes to playing without entry or simultaneous-use limits. The revision applies to every player who satisfies the criteria, not only those who joined the legal challenge.

Who Now Receives A-1 Protection

One added group consists of players covered by Article 11(1)(4)(a)–(d) of the current Rules on Player Contracts and Registration. Those provisions cover players registered before specified dates as Japanese-nationality-acquired players, special permanent residents, people who completed compulsory education in Japan and continued to reside here, or former “Asia slot” players.

The other added group consists of players registered in Category A through 2025–26 who acquired Japanese nationality by May 31, 2025. A player who applied by the cutoff and acquired nationality later also qualifies.

The Difference Appears on Match Day

A-1 includes players with no representative history for another union who spent at least six of Japan’s nine compulsory-school years in the country; players with no such history who were born in Japan or have a parent or grandparent born here; players with at least 30 caps for Japan’s senior 15-a-side team; and the two new transition groups.

A-2 covers other players with no representative history for another union and at least 48 months of continuous registration with the Japan Rugby Football Union. There is no cap on the number of A-2 players a club may register to its team.

The constraint arrives when a squad is selected. A 23-player match roster must contain at least 14 A-1 players, and at least eight must be on the field simultaneously. Looked at from the other side, A-2 is limited to nine on the match roster and seven on the field, including areas that overlap with B and C limits. Not every naturalized player is restricted, and the settlement did not free every naturalized player from the new structure.

Citizenship, Test Eligibility and League Status Differ

Three separate ideas are easily collapsed in this debate: Japanese citizenship, eligibility to represent Japan in rugby and League One’s domestic registration category.

World Rugby Regulation 8 uses birth, a parent’s or grandparent’s birth, union registration and other prescribed links to determine representative eligibility. Its official guidelines state that citizenship or a passport does not by itself determine which union a player may represent. League One describes this as an association-affiliation principle rather than a nationality principle.

A-1 and A-2, by contrast, are domestic competition classifications. League One’s 48-month A-2 registration test should not be mistaken for World Rugby’s separate representative-eligibility rules. The nationality provision added in August is a transition exception based on continuity, not the league’s general organizing principle.

Settlement Ended the Petition, Not the Legal Debate

The public legal record confirmed by League One is narrow. Some players sought a provisional injunction from the Tokyo District Court to stop the system’s implementation. After negotiations, a settlement was reached on August 27; the court petition and the JFTC filing were then withdrawn.

That sequence is not a judicial finding that the system was illegal, void or discriminatory. The league’s published notice does not disclose the settlement terms, the applicants’ names or number, their pleadings, or a JFTC determination. This report therefore connects the revision to the settlement without treating it as an admission of legal liability.

The JFTC has separately urged sports governing bodies to review rules that may restrain competition. Its 2019 paper concerns transfer restrictions in general, however; it is not a ruling on League One’s registration categories.

The Homegrown Aim and the Chosen Tool

League One says the policy is intended to give children and young players developed in Japan a visible route to the professional game, encourage participation and increase the domestic player population. It connects six of the nine compulsory-school years in Japan with a homegrown model used in other competitions.

That objective can be evaluated separately from the decision to impose new consequences on current players. The league acknowledged on April 30 that its explanation to affected players had been insufficient and had caused anxiety. The August revision preserves the stated development policy while making the league absorb part of the transition cost.

The future effect is still material. Using a 2024–25 Division 1 sample, League One estimated that the average 23-player roster contained 12.2 players who would be A-1. The new minimum is 14. Clubs will have to adjust recruitment, development, contracts and selection together.

The Remaining Line Is May 31, 2025

The settlement leaves a bright date boundary. A player who applied for Japanese nationality after May 31, 2025 does not qualify for the special measure on that basis. Unless another A-1 route—birth, schooling, ancestry or 30 Japan caps, for example—applies, the player will be A-2.

League One says the cutoff responds to ambiguity in its May 2025 announcement. Yet it also means two Japanese citizens at the same club could receive different match-day treatment because of application timing or historical registration route.

The system begins in 2026–27, and the league says it will continue to review the effects. The measurable questions now concern the number of players covered, club-by-club roster changes, actual minutes for A-2 players, and whether more opportunities reach players developed in Japan.