Shijonawate Sta. (JR Touzai-Gakkentoshi Line), walk 15 mins to the trailhead
There are some good maps on the city website so I recommend you print and take one with. I also saw some at Shijonawate Station but not at Nozaki Station. The castle is deceptively large and it's easy to miss sections. I spent about 4 hours on the castle grounds, excluding the hike each way, trying to get into as many baileys as possible and to uncover as many of the stone walls as possible. There are bits of ishigaki stone walls scattered throughout the site. Some are big wall sections but some are very small and mostly overgrown. You can probably tell from some of the pictures that I've brushed or scraped away vegetation in some places to uncover the stonework below. In a few places, paths or stone walls have eroded just in the last few years. I hope they are able to preserve the site better for the future. Shijonawate Sta. is closest to the Iimori Castle trailhead and more trains stop here, but you can also go to Nozaki Sta. and hike through Nozaki Castle on the way to Iimori Castle.
Iimori Castle
Iimori Castle# QUERYd658d5529feddf6fff9a3f1adeaeb842
Iimori Castle true
Iimori Castle# QUERY055a6a9245d989ed4b4863d29ccd818b
Iimori Castle false
Iimori Castle# QUERY0bef25534824933f96d6af20206b940d
Iimori Castle# QUERY331b9f7e7ae7de253d8e3bb52e05f59f
Iimori Castle# QUERY8711adc72bed02e43e2d2aea5fc81f82