Please note that the texts of laws available through the following links do not reflect subsequent amendments.

[The Japanese Law] Law related to Intellectual Property

(1) Intellectual Property Basic Act
Intellectual Property Basic Act

(2) Industrial Property Laws
Patent Law of Japan
Utility Model Law of Japan
Design Law of Japan
Trademark Law of Japan

(3) Other Intellectual Property Laws
Copyright Law (CRIC)
Unfair Competition Prevention Law of Japan (Consolidation)
Plant Variety Protection and Seed Act

(4) Laws Related to Intellectual Property Rights
Act on Prohibition of Private Monopolization and Maintenance of Fair Trade
PATENT ATTORNEYS LAW (JPAA)
Civil Code(Part I - Part III)
Industrial Technology Enhancement Act

[The Japanese Law] Treaty

Berne Convention for the protection of Literary and Artistic Works
Protocol Relating to the Madrid Agreement concerning the International Registration of Marks
Trademark Law Treaty
INTERNATIONAL CONVENTION FOR THE PROTECTION OF NEW VARIETIES OF PLANTS
Paris Convention for the Protection of Industrial Property
Patent Cooperation Treaty
Gegulations under the Patent Cooperation Treaty
Agreement on Trade-Related Aspects of Intellectual Property Rights

[The Japanese Law] Examination Guidelines

Examination Guidelines for Patent and Utility Model in Japan (4.11.2005)
Examination Guidelines for Trademarks (May,2007)
Implementing Guidelines for Inventions in Specific Fields (Chapter 1: Computer Software
    Related Inventions, Chapter 2: Biological Inventions)

[The Japanese Law] Procedures for Obtaining Industrial Property Rights

Procedures for Obtaining a Patent Right
Procedures for Obtaining a Utility Model Right
Procedures for Obtaining a Design Right
Procedures for Obtaining a Trademark Right

[The Japanese Law] Other Information on Intellectual Properties in Japan

Schedule of Fees (JPO)
2003 AMENDMENT TO JAPAN PATENT LAW (JPAA)
Patent Prosecution Highway(PPH)

[The US Law] Other Information on Intellectual Properties in Japan

United States Code
Code of Federal Regulations
Manual of Patent Examining Procedure (MPEP)
U. S. TRADEMARK LAW
Copyright Law of the United States
Code of Federal Regulations Title 37 - Patents, Trademarks, and Copyrights