I walked the Shikoku Pilgrimage in March/April 2018 and October/November 2019. The daytime temperatures were around 68°F (20° C) during these times. My equipment was adjusted to these mild temperatures.
I spent the night in guesthouses, temple accommodations and henro houses. In larger cities also sometimes in a business hotel. I didn’t spend the night outdoors and therefore I didn’t take any equipment with me, like tent, sleeping bag etc.
Based on my experiences, I have compiled the following tips, which can serve as an orientation for your packing list.