Recently, I visited Gokokuji Temple in Shimabara, Nagasaki Prefecture, nestled in the southeastern part of the Japanese archipelago, accompanying descendants of the Yeo clan. This temple holds historical significance as it was once led by a monk named Yeo Dae-nam (1580-1659), originally from the current Hadong County, South Gyeongsang Province, who served as its first chief monk over four centuries ago.