The golden-rayed lily (Lilium auratum) is one of the true lilies and it is native to Japan. The lily does well in plain or acidic soil; rich or fertilized soil will kill the plant (Wikipedia). It is listed in the Yamanashi Red Book as one of the Near-Threatened Species in Yamanashi Prefecture. (https://en.wikipedia.org/wiki/Lilium_auratum)
Golden-Rayed Lilies, Kitagawa, Minobu, Yamanashi, 7/22/2023