Foundation and Role as a Post Station
The history of Karuizawa begins long before it became a fashionable resort. The settlement initially developed during the Edo period (1603–1868) as an important post station, or shukuba. The town was located on the Nakasendo—one of the five main highways connecting Edo (modern-day Tokyo) with the imperial capital, Kyoto.
The first documented mentions of the settlement as a key transit hub date back to the early 17th century. Travelers, daimyo (feudal lords), and merchants would stop here before or immediately after the difficult crossing of the mountains, ensuring a constant flow of people and resources.
Key Factors in Its Rise
The transformation of a small settlement into a prosperous town was driven by a combination of geographical and political factors:
- Geographical Location: The town sits at the foot of the active volcano Mount Asama and directly before the steep Usui Pass. The difficulty of crossing this pass made a stop in Karuizawa practically mandatory for travelers needing rest and fresh horses.
- Political System: The Shogunate's policy requiring feudal lords to visit Edo regularly (the sankin-kotai system) guaranteed a steady stream of wealthy processions through the town, stimulating the service industry.
- Climate: Its high-altitude location (about 1,000 meters above sea level) provided cool relief even during the hottest summer months, which later played a decisive role in the town's repurposing.
Early Cultural and Economic Features
In its early period, Karuizawa’s economy depended entirely on servicing the road. Honjin (inns for high-ranking officials and nobility) and teahouses flourished here. However, with the advent of railways in the late 19th century, the role of the post station faded, and the town could have fallen into decline.
A rebirth and cultural transformation occurred in 1886 thanks to the Canadian missionary Alexander Croft Shaw. Struck by the beauty of the local nature and a climate reminding him of his native Scotland, he built the first summer villa here. Shaw actively promoted the town as an ideal place for health and relaxation, calling it a "hospital without a roof." Following his lead, foreign diplomats and the Japanese intelligentsia flocked here, creating a cosmopolitan character unique for the Japanese countryside, featuring churches, Western-style bakeries, and summer residences.