**Zenkoji Temple** in Nagano is one of Japan’s oldest and most important Buddhist temples, founded in the 7th century. It houses the first Buddhist statue ever brought to Japan, a hidden image (hibutsu) that is never shown to the public. What makes Zenkoji truly special is its open and inclusive tradition—it welcomes people of all faiths and backgrounds, regardless of gender or belief. One of the temple’s most unique features is the **Okaidan Meguri**, a pitch-dark underground passage beneath the main hall where visitors search for a metal key said to grant enlightenment. The spiritual atmosphere, historical depth, and beautifully preserved architecture make it a must-visit in Nagano. Entry to the outer temple grounds is free, while admission to the inner chamber, passage, and museum is **¥600** for adults. Whether you're seeking history, culture, or quiet reflection, Zenkoji offers a powerful and memorable cultural experience in the heart of the city.

Optional: Shibu Onsen is a historic hot spring resort town nestled on a gentle slope along the Yokoyugawa River in the Yamanouchi municipality of northern Nagano Prefecture. Boasting a 1,300-year history, this atmospheric destination feels frozen in time with its narrow cobblestone lanes and multistorey wooden ryokan—including the famous Kanaguya, which widely serves as a visual inspiration for Studio Ghibli's Spirited Away. Overnight guests are encouraged to change into traditional yukata robes and wooden geta sandals to stroll the streets and participate in the Kyu-no-yu Meguri (Nine Public Baths Tour). Using a special master key provided by their inn, visitors can unlock and soak in nine distinct, 100% free-flowing mineral baths scattered throughout the village, collecting stamps along the way for good fortune