Tsuburaya quickly moved on to his next project, Battle of the Japan Sea, regarded as the third film in the "Toho 8.15 series" (following Japan's Longest Day and Admiral Yamamoto). Tsuburaya was provided with his largest budget ever for the Seiji Maruyama-directed war epic film about the Russo-Japanese War. Thus, 60 members of his department's artists created an estimated 107 ship miniatures for the film and constructed a 13-meter model replica of the Imperial Japanese Navy's battleship Mikasa, in contrast to the other 3-meter ships. Released in August 1969, Battle of the Japan Sea was the second highest Japanese grosser of 1969, earning against its budget. Deemed one of Tsuburaya's masterpieces, Battle of the Japan Sea was the last production he officially took part in as the special effects director. On the same month, Tsuburaya Productions' next series, Horror Theater Unbalance (aired in 1973), entered the production process: Tsuburaya was credited as its supervisor.
Tsuburaya quickly moved on to his next project, Battle of the Japan Sea, regarded as the third film in the "Toho 8.15 series" (following Japan's Longest Day and Admiral Yamamoto). Tsuburaya was provided with his largest budget ever for the Seiji Maruyama-directed war epic film about the Russo-Japanese War. Thus, 60 members of his department's artists created an estimated 107 ship miniatures for the film and constructed a 13-meter model replica of the Imperial Japanese Navy's battleship Mikasa, in contrast to the other 3-meter ships. Released in August 1969, Battle of the Japan Sea was the second highest Japanese grosser of 1969, earning against its budget. Deemed one of Tsuburaya's masterpieces, Battle of the Japan Sea was the last production he officially took part in as the special effects director On the same month, Tsuburaya Productions' next series, Horror Theater Unbalance (aired in 1973), entered the production process: Tsuburaya was credited as its supervisor.