The definitive Roppo (the six Japanese codes of laws) with precedents for practitioners. Pertinent precedent summaries have been systematically classified and organized under clear headings.
Contains a rich abundance of legal texts for reference based on the Complete Roppo published by Yuhikaku, the byword for statute books.
Roughly 14,000 carefully selected precedent summaries. Carries helpful related information of all kinds as hints for precedent study and research, including references to the Hanrei Hyakusen Series (The 100 Selected Precedents Series) and commentaries on important precedents that are attached to the precedent summaries.
Features of the Reiwa 8 (2026) Edition
Contains important legal amendments, including those to the Code of Criminal Procedure (digitalization of criminal procedures), the Act on Ensuring Proper Transactions Involving Specified Entrusted Business Operators (formerly the Subcontract Act), the Act on Building Unit Ownership, the Whistleblower Protection Act, the Act on Comprehensive Promotion of Labor Measures, the Rules of Civil Procedure, and the Rules of Criminal Procedure. Newly added content includes the Act on Security by Transfer of Title and Retention of Title Agreements (the Act on Security by Transfer of Title), the Standards on the Conclusion, Renewal, and Termination of Fixed-term Employment Contracts, and the Act on Employment Promotion of Persons with Disabilities.
The JapanKnowledge edition has been designed for ease of movement within pages and to refer to precedents and other material, with a button to display legal texts for reference in the main text screen and two-way links between precedents and texts, as well as a table of contents for each law or regulation name. A link to the overall table of contents is also displayed at the top of each law or regulation name. Quick access to other laws and regulations is also enabled.
Up to date as of: September 1, 2025
Representative Editors: Morita Hiroki, Koizumi Naoki, Ishikawa Kenji, Saito Makoto, Matsushita Junichi, Kansaku Hiroyuki
| Original books | 有斐閣 判例六法Professional 令和8年版 |
|---|---|
| Publisher | YUHIKAKU PUBLISHING CO., LTD. |
| Publication date | November 26, 2025 |
| Number of volumes | Twe volumes |
| Book price | ¥7,260 (Pre-tax price ¥6,600+tax10%) |
| Release date | August 9, 2022 (Reiwa 4 (2022) Edition) |
| Number of entries | 8,953 entries |
| Number of characters | 19,028,200 characters |
| About search | ― |
| Frequency of update | Annually |
| Available services |