Following years of a certain radioactive beast's domination at the box office, many Japanese studios tried to replicate the formula with their own brands of monster movies. One of the most fascinating, if short-lived, dives into that fiendish deep end was the one by Shochiku, a studio better known for elegant dramas by the likes of Kenji Mizoguchi and Yasujiro Ozu. In 1967 and 1968, the company created four certifiably batty, low-budget fantasies,...