In September 2020, Japanese Defense Minister Taro Kono issued a formal directive requiring Japan Air Self-Defense Force (JASDF) pilots to document and report encounters with unidentified aerial objects according to standardized protocols — the first time Japan had institutionalized UAP reporting within its military structure. The directive instructed pilots to photograph or film unidentified objects when safely possible and to file formal reports through JASDF channels rather than treating such encounters as unofficial curiosities.
This institutional shift had measurable consequences in Japan's annual scramble statistics, which the Ministry of Defense publishes with greater transparency than most nations. Japanese scramble data distinguishes responses by category: Chinese military aircraft, Russian military aircraft, other identified foreign aircraft, and unresolved or unidentified aerial objects. In fiscal year 2022, JASDF conducted 778 total scrambles; fiscal year 2023 recorded 669 — a decline in absolute numbers driven partly by reductions in Chinese and Russian provocations during those specific periods. However, within both years' totals, the proportion of scrambles attributable to unresolved aerial contacts — drones and unidentified objects that pilots could not classify as any known aircraft type — increased year-over-year even as geopolitically attributed scrambles declined.
The trend data conveyed a specific message: JASDF pilots were routinely encountering aerial objects they could not identify, at a rate that was growing as identified foreign military provocations fluctuated independently. The Diplomat's April 2023 analysis of the Ministry of Defense data was the first English-language reporting to highlight this disaggregation of the scramble statistics and its UAP implications.
The reporting on JASDF UAP intercept trends contributed directly to parliamentary action. Diet members who had been tracking Japan's UAP exposure — including those who had studied the AARO hotspot designation of the western Japan corridor — cited the scramble trend data as additional evidence of an ongoing unresolved aerial presence in Japanese airspace. The June 2024 formation of the Diet Members' UAP Clarification League, the first formal cross-party parliamentary UAP caucus in Japanese history, drew on this accumulation of institutional data including the scramble statistics.