The Japan Branch of the SSSP or Science Special Search Party (科学特捜隊 Kagaku Tokusō Tai), also known as the Science Special Investigation Team (科学特別捜査隊 Kagaku Tokubetsu Sōsa-tai) but in the English-speaking world generally referred to as The Science Patrol. The photo is from 1966.
Members from left to right, starting at the top:
Ordnance and Munitions Officer Mitsuhiro Ide
Sharpshooter Daisuke Arashi
Captain Toshio Muramatsu
Communications Officer Akiko Fuji
Vice-Captain Shin Hayata