In a hut overlooking the ocean, ama (professional, mostly female, shellfish divers) grill seafood lunches – including items from their morning haul – and entertain with stories about their (sometimes treacherous) lives at sea. Some Japanese ability is necessary to appreciate the latter, but they're warm and welcoming and eager to feed international visitors.
Book in advance online by 5pm the preceding day, and look out for a follow-up email (in English) from them to confirm. Unless your party is large, be sure to book Ozegosan, the smaller hut, perched on the cliff with spectacular views.