mountain brownies
If you've been in Japan for a while and miss the taste of a warm brownie, try the mountain brownies at Sagamiya. The shop is a few steps away from the tourist information center, right in front of the bus stops. You can't miss the smell, as they are made on site!!
black eggs
Try the black eggs é»çå kuro-tamago at Owakudani. Boiled on site, their shells are a mottled black due to a chemical reaction with the sulphurous water, but the inside is quite tasty. According to Japanese legend, every one you eat will add seven years to your life. 5 eggs and hence 35 years will set you back just Â¥500.