| 1763 |
明和元年（1764年）に佐藤万右衛門が旧中山道軽井沢宿の旅籠「亀屋」を開業し、万平ホテルの歴史が産声を上げる。 |
| 1885 |
明治19年（1886年）にカナダ人宣教師アレクサンダー・クロフト・ショーと帝国大学の教師ジェームズ・メイン・ディクソンが旅籠「亀屋」に滞在。 |
| 1885 |
Alexander Croft Shaw, a Canadian missionary, and James Main Dixon, an instructor at Imperial University, stayed at the Kameya Inn over a summer. |
| 1894 |
明治27年（1894年）に初代佐藤万平が亀屋を欧米風ホテルに改装し、屋号を「亀屋ホテル」に改称。 |
| 1894 |
Their extended stay inspired the founder Sato Mampei I to convert his inn into a Western-style hotel and change the name to Kameya Hotel. Thais is the year in which the current Mampei Hotel was founded. |
| 1896 |
明治29年（1896年）に「亀屋ホテル」から「萬平ホテル」へ改名。 |
| 1896 |
The name was changed from Kameya Hotel to Mampei Hotel to make it easier for foreigners to pronounce. |
| 1902 |
明治35年（1902年）に万平ホテルが現在の桜の沢に移転。 |
| 1902 |
Up until that point, Mampei Hotel had been located near the post office on what is now known as Old Karuizawa Ginza Street. However, in this year, it was relocated and reconstructed in Sakuranosawa where it currently stands. |
| 1906 |
Founded in 1906, by the entrepreneur Naoyoshi Yamamoto, this hotel came to be known as the “Rokumeikan* of Karuizawa” and was long cherished by many cultural figures and leaders of the financial world. |
| 1919 |
Kunisaburo, who was married to Yoshi, the only daughter of Mampei I, took on the name Mampei II. The Nihonkan (now the Hinoki Nihonkan) is relocated and expanded to serve as a hotel providing both Japanese and Western-style rooms. |
| 1923 |
大正8年（1923年）に初代万平の娘「よし」の婿・国三郎が「二代目万平」を襲名し、日本館を移設増築。 |
| 1936 |
昭和11年（1936年）に本館の取り壊し・新築に着工し、アルプス館が完成。万平ホテルは「萬平ホテル」から「万平ホテル」へ改名。 |
| 1936 |
Work began to reconstruct the main building, demolition of which began the previous year. The Alps Wing, which retains its grand appearance to this day, was completed. This is also the year when the characters used to write “Mampei” in the name of the hotel were changed from “萬平” to “万平.” |
| 1945 |
昭和20年（1945年）に第二次世界大戦後、米国陸軍第八軍に接収され営業停止。GHQの要請で冬季営業が可能なよう改造が加えられ、1952年に通常営業を再開。 |
| 1945 |
Following WW II, the hotel was seized by the U.S. Eighth Army and closed. At the request of GHQ, the hotel was modified to be able to operate during the winter. Later, it reopened for regular business in 1952. |
| 1972 |
昭和47年（1972年）に旧アサマ館・桜の間で田中角栄首相とキッシンジャー大統領補佐官の会談が行われた。 |
| 1972 |
A meeting was held between then-Prime Minister Tanaka Kakuei and Presidential Advisor Henry Kissinger in the Sakura Room in the former Asama Wing. |
| 1977 |
昭和52年（1977年）にジョン・レノンが3シーズン、毎年夏にアルプス館に宿泊。 |
| 1977 |
John Lennon stayed in the Alps Wing with his family every summer for four years up until 1979, the year before his death. |
| 1980 |
In 1980, it was designated as an Important Cultural Property of Japan. |
| 1997 |
平成19年（1997年）にアルプス館・桧日本館が経済産業省の近代化産業遺産に登録。 |
| 2001 |
平成13年（2001年）にウスイ館を新築。 |
| 2007 |
The Alps Wing and Hinoki Nihonkan were registered as heritage of industrial modernization sites by the Ministry of Economy, Trade and Industry. |
| 2018 |
平成30年（2018年）にアルプス館が国の登録有形文化財に登録。 |
| 2018 |
The Alps Wing was registered as a tangible cultural property by the national government. |
| 2023 |
令和5年（2023年）に創業130周年記念事業としてホテルの営業を一時休止し、大規模改修・改築工事を実施。 |
| 2023 |
The hotel was temporarily closed for major renovations and remodeling to commemorate the 130th anniversary of the hotel’s founding. |
| 2024 |
令和6年（2024年）に創業130周年記念事業の大改修を経て、再び歩み始めました。 |
