Take a 10-day trek through the Kunisaki Peninsula, tucked away on the eastern end of Japan’s Inland Sea. Follow the footsteps of Buddhism monks as they did 1,000 years ago through forests, farmlands, and surround Kyushu mountains, visiting Buddhist and Shinto shrines, statues, temples and stone carvings. The trek is only 8-10 miles each day and you get to stay at traditional Japanese inn's (Ryokans), bathe in hot springs (Onsens), eat traditional food (some of the best sushi ever), as well as interact with the locals.
You spend one of the nights at a 200 years old temple and watch a temple ceremony, while the priest's wife cooks a vegetarian dinner.
This is the best way to explore Japanese countryside!