01
Factual background & dispute
- The applicant designated DABUS as the inventor in national phase filing documents in Japan.
- The Japan Patent Office issued an amendment order requiring the inventor name to be a natural person, which the applicant declined to make.
- The applicant argued that the current Patent Act accommodates autonomous inventions created by artificial intelligence.
02
Core issues & judicial focus
- Whether an artificial intelligence system can qualify as an inventor under Japanese patent law
- Whether autonomously generated AI technical solutions can be patented without naming a human inventor
- Whether legal recognition of AI inventorship requires legislative reform
03
Judicial finding & holding
- The IP High Court held that an inventor under patent law must be a natural person and affirmed rejection of the DABUS application.
- The later Supreme Court outcome is reported in the Japanese counsel’s update of 1 April 2026 and is not treated as an independently reviewed Supreme Court order.
Dates & procedural record
- IP High Court judgment.
- Counsel reported that the Supreme Court declined to accept the petition on 4 March 2026.Online sources; no specific document reviewed.
04
Practical risk implications
01R&D teams must preserve contemporaneous records of human contributions in problem formulation, conception, validation, and refinement.
02Filing teams must verify inventor eligibility and supporting evidentiary chains before submitting patent applications.
03Designating solely an AI model as an inventor will halt patent prosecution.