A surge in inbound tourism has boosted the number of vegetarians visiting Japan, but businesses in the country have not been able to fully meet demand by providing sufficient animal-free food options, a body that promotes vegetarianism said. While Japanese food is often considered healthy, many dishes are made using “dashi” broth extracted from fish such as bonito, meaning vegetarians and vegans cannot eat them. “I love tempura soba, but I haven’t had a chance to eat it here,” said Ruby Ramsden, a 25-year-old vegan studying at a graduate school of Waseda University in Tokyo. Vegans do not eat …