Soy Sauce aged 4 years (Tsuru Bishio), 18oz (532ml)Tsuru bishio is the flagship series of soy sauce for Yamaroku Shoyu and is aged the longest between 3 5 years. Tsuru() means "crane" and bishio () means "condiment". In Japan, cranes are regarded as auspicious birds and symbolize longevity. It is said the song of cranes can reach the heavens, and Yamaroku Shoyu wants this soy sauce to be like the cranes which can reach the heavens and be known to everyone. Tsuru bishio is characterized as having a