Photo: baku13, CC BY-SA 2.1 jp via Wikimedia Commons
Large underground bunker complex built during the Second World War, it was meant to protect the Emperor and the central organs of government, but Japan surrendered before its completion.
The Matsushiro Underground Imperial Headquarters was a large underground bunker complex built during the Second World War in the town of Matsushiro, which is now a suburb of Nagano, Japan.
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加賀井温泉 一陽館
This unusual onsen has separate long narrow flowing indoor baths with brown water for males and females, and two outdoor mixed baths. Bring a large towel.
川中島古戦場
Kawanakajima Battlefield is the site of the famous battles fought between Takeda Shingen and Uesugi Kenshin in the 16th century, most notably the fourth battle in 1561. The battlefield was part of the wider plain where the forces of the two warlords repeatedly clashed during the Sengoku period. Today the site is a peaceful park with a shrine, monuments and information panels, including a statue depicting the legendary confrontation between Shingen and Kenshin. Little of the original battlefield survives, but it is an interesting stop for visitors interested in Japan's samurai history.
大室温泉まきばの湯
Has a large outdoor bath (rotenburo) with magnificent views across the Zenkouji Plain to the Northern Alps. Great anytime, but best in winter.
西之門よしのや
A sake brewery with attached restaurant and shops, all housed in traditional buildings. The brewery has a small free museum, though it consists of little more than some historic photographs and a view of the stainless-steel brewing equipment.
長野県立美術館
Reopened in a new building in 2021. The prefecture's premier art museum. The Higashiyama Kaii Gallery showcases the tranquil landscapes (depicting Northern Europe as well as Japan) of one of the masters of nihon-ga (traditional "Japanese-style painting").
善光寺
This temple, built in the 7th century, is a major pilgrimage site. Its major draw is the hibutsu (秘仏), or hidden Buddha. Its replica statue dating from the 15th century is displayed to the public every six years (the last time was in 2022, one year postponed for COVID19. The next is due 2027). A major renovation of the great inner gate was finished in 2007. You can see a beautiful row of houses along the street. There are restaurants with atmosphere. You can also buy a talisman as a souvenir.