Wikipedia
, also known as the "Temple of the Buddha's Light", was originally named Kosho-ji, a Jōdo Shinshū temple in the Yamashina ward of Kyoto, which later moved to the heart of Kyoto. The temple was founded and officially opened by a disciple named Ryōgen in 1324, but by the 15th century, Bukkō-ji was the largest and most successful temple, and its network of branch temples extending throughout the provinces of western Japan. As a rival to the Hongan-ji, it received much criticism for its evangelical practices from Kakunyo the head of the Hongan-ji. Around 1481, however, Bukkō-ji became a subordinate temple to the Hongan-ji. Many of the Bukkō-ji's congregation thus became members of the Hongan-ji, thus greatly reducing the stature.
While Bukkō-ji is technically an independent Jōdo Shinshū branch it has had close links to the Hongan-ji lineage since the time of Rennyo.