Naganoken Seiyaku is the pharmaceutical company established in 1948. It produces mainly Hyakusogan that is the popular local medicine of Kiso that has over 200 years of the history. Hyakusogan was created around the end of Edo period by Shugenja of Mt. Ontake. It is made from the skin of Amur Corktree and 4 other trees. It is a great medicine for your stomach problems since Edo period. Many of the travelers and climbers of Mt. Ontake bought Hyakusogan as their souvenir.

At the factory of Naganoken Seiyaku, there is a factory tour that you can see the manufacturing line of Hyakusogan. It has also the shop that you can buy Hyakusogan and other medicines.

Hyakusogan : Ingredients
The skin of Amur Corktree
The skin of Magnolia obovata
Geranium thunbergii
Atractylodes japonica
Swertia japonica

Great for Over eating and over drinking.
The problem with a stomach.