Nihon Gakujutsu Kaigi. Taiyō Kyokushōki Kokusai Kansokunen Shōiinkai.

• IQSY data of ionospheric absorption at Akita, from 1 January 1964 to 31 December 1965
• IQSY data of ionospheric drifts at Yamagawa in Japan
• Japanese contribution to the International Years of the Quiet Sun, 1964-1965