In 1950, Gempo Yamamoto roshi decided it was time for him to retire as abbot of Ryutaku-ji, and he wanted to appoint Soen as head abbot. Soen was hesitant and anxious about the proposition of becoming abbot. He fled the monastery briefly after assuming the position, leaving Gempo with no other choice but to resume the position temporarily. In 1951, Nakagawa returned and resumed his position as abbot at Ryutaku-ji. Soen was a non-traditional abbot, deciding to not distinguish himself from his students. He wore the robe of a monk, he bathed and ate in their quarters. Over the next few years Soen set out to visit other masters stating that, since he had only finished 500
koans of Hakuin's 1700 curriculum, he needed more training. He went to Hosshin-ji and studied under
Harada Daiun Sogaku, lineage holder of both the
Sōtō and Rinzai school. In 1954, Soen met a young monk named Tai Shimano (
Eido Tai Shimano) at a funeral for
Zen priest
Daikyu Mineo. In the summer of that year, Tai Shimano ordained as a monk at Ryutaku-ji under Soen's tutelage. In 1955, Soen made his second trip to the United States and Nyogen Senzaki came to Ryutaku-ji to visit with Soen for 6 weeks. In 1957, Keigaku Katsube roshi died. In 1958, Nyogen Senzaki died. Soen was named as the executor of Senzaki's estate and returned to the U.S. to settle Senzakis' affairs. In 1959 and 1960, Soen traveled to the US twice, leading a sesshin in Honolulu, HI during the latter. In 1961, Gempo Yamamoto roshi died. In 1962, Soen's mother died. Soen and his mother were extraordinarily close. She would visit Ryutaku-ji almost daily to go on excursions into the mountains to talk. They would sit together to have tea, or listen to classical music together. Her death, along with Gempo's death the year before, sent Soen into a depression. He frequented Dai Bosatsu Mountain many times following this for solitary retreat. In 1963, Nakagawa traveled to the United States, India, Israel, Egypt, England, Austria and Denmark with
Charles Gooding, a former student of Nyogen Senzaki, teaching Zen with various sanghas. ==Accident, 1967==