Kairō

The kairō (回廊 or 廻廊^?), bu (廡^?), sōrō or horō (歩廊^?) is the Japanese version of a cloister, a covered corridor originally built around the most sacred area of a Buddhist temple, a zone which contained the Kondō and the pagoda. Nowadays it can be found also at Shinto shrines and at shinden-zukuri aristocratic residences.

The kairō and the rōmon were among the most important among the garan elements which appeared during the Heian period. The first surrounded the holiest part of the garan, while the second was its main exit. Neither was originally characteristic of Shinto shrines, but in time they often came to replace the traditional shrine surrounding fence called tamagaki. The earliest example of a kairō/rōmon complex can be found at Iwashimizu Hachiman-gū, a shrine now but a former shrine-temple (神宮寺^?). The rōmon is believed to have been built in 886, and the kairō roughly at the same time. Itsukushima Jinja is an example of the mature form of the complex.

...
Wikipedia