When Emma Peters entered third grade, her family welcomed home a new dog named Lily Bell, who was only 8 weeks old. The now-16-year-old mini dachshund has been with the family ever since.

Lily Bell Hutte, equipped with a cafe, shop and tourist information center, serves as the gateway to Fujiyama Twin Terrace, which sits on the 1,600-meter-high Shindo Pass. The ridge straddles the ...