| 1892 |
Kawagoe Railway was established in 1892 (Meiji 25). |
| 1892 |
Kawagoe Railway was established. |
| 1893 |
Magosawa Railway was established in 1893 (Meiji 26). |
| 1893 |
Mamei Railway was established. |
| 1895 |
The Kotobuki Line from Kokubunji to Kawagoe (now Hon-Kawagoe), opened in 1895 (Meiji 28), is one of the oldest lines. |
| 1895 |
The oldest line currently operated by Seibu Railway, from Kokubunji to Kawagoe (now Hon-Kawagoe), was opened. |
| 1896 |
Suruga Electric was established in 1896 (Meiji 29). |
| 1896 |
Sundō Electric was established. |
| 1898 |
The Mishima Town to Minamijo section of Magosawa Railway opened in 1898 (Meiji 31). |
| 1900 |
Ohmi Railway from Yokaichi to Kisegawa opened in 1900 (Meiji 33). |
| 1906 |
Suruga Electric was renamed Suruga Electric Railway in 1906 (Meiji 39). |
| 1907 |
Magosawa Railway was dissolved in 1907 (Meiji 40). |
| 1912 |
Musashino Railway was established in 1912 (Meiji 45). |
| 1912-05-07 |
Musashino Railway was established in 1912 (Meiji 45), with May 7 as its founding anniversary. |
| 1912-05-07 |
Musashino Railway was established. |
| 1914 |
World War I began. |
| 1915 |
A line connecting Ikebukuro and Hannō opened in 1915 (Taisho 4). |
| 1915 |
A line connecting Ikebukuro and Iwanuma was opened. |
| 1916-10 |
Fuji Water Electric merged with Suruga Electric in October 1916 (Taisho 5). |
| 1916-10 |
Fuji Water Electric merged with Sundō Railway and acquired the railway business between Mishima and Oji. |
| 1916-12 |
Suruga Railway was established in December 1916 (Taisho 5). |
| 1916-12 |
Sundō Railway was established. |
| 1918 |
World War I ended. |
| 1920 |
Hakone Land Corporation was established in 1920 (Taisho 9). |
| 1920 |
Hakone Yusen was established. |
| 1922 |
Daiyuzan Railway was established in 1922 (Taisho 11). |
| 1922 |
Seibu Railway (formerly Seibu Railway) was established. |
| 1925 |
In 1925 (Taisho 14), Doyu Mountain Railway opened the provisional Odawara to Doyu Mountain section. |
| 1925 |
Daikoku Mountain Railway was established. |
| 1927 |
In 1927 (Showa 2), Doyu Mountain Railway extended to Odawara, completing the line. |
| 1928 |
Hakone Land Co., Ltd. was established. |
| 1930 |
In 1930 (Showa 5), the former Seibu Railway opened between Higashi Murayama and Murayama Reservoir. |
| 1930 |
The former Seibu Railway opened the Higashimurayama–Murayama Reservoir Front line. |
| 1931 |
In 1931 (Showa 6), Omi Railway opened between Hikone and Maibara. |
| 1931 |
Omi Railway opened the Hikone–Yonehara line. |
| 1932 |
In 1932 (Showa 7), Tooura Motor Co., Ltd. was established, becoming the predecessor of Seibu Bus. |
| 1934 |
The Tanna Tunnel on the Tokaido Main Line opened. |
| 1936 |
Fuji Hakone National Park was designated. |
| 1938 |
In 1938 (Showa 13), Sunzu Railway merged with Hakone Yusen. |
| 1938 |
Surumugi Railway merged with Hakone Yusen. |
| 1940 |
Yasujirō Tsutsui became president of Musashino Railway. |
| 1941 |
In 1941 (Showa 16), Sunzu Railway absorbed Doyu Mountain Railway. |
| 1941 |
The Pacific War began. |
| 1943 |
In 1943 (Showa 18), the former Seibu Railway opened between Higashi Murayama and Murayama Reservoir. |
| 1944 |
In 1944 (Showa 19), Omi Railway merged with Yokaichi Railway. |
| 1945 |
The war ended. |
| 1946 |
In 1946 (Showa 21), Tokyo Fireproof Building Materials, the predecessor of Seibu Construction, was established. |
| 1947 |
In 1947 (Showa 22), the villa of the Prince Takamado family in Chōga-taki, Karuizawa, was renovated without re-selling, and opened as "Prince Hotel". |
| 1947 |
Prince Hotel opened. |
| 1949 |
Japanese National Railways and the Japan Monopoly Corporation were established. |
| 1950 |
The Hakone Mountain War broke out. |
| 1951 |
In 1951 (Showa 26), UNESCO Village opened, and the fairy tale train started operating to UNESCO Village. |
| 1951 |
UNESCO Village opened. |
| 1952 |
In 1952 (Showa 27), the line between Takadanobaba and Seibu Shinjuku opened. |
| 1952 |
The Takadanobaba–Seibu Shinjuku line opened. |
| 1953 |
In 1953 (Showa 28), Takanawa Prince Hotel opened. |
| 1953 |
Takanawa Prince Hotel opened. |
| 1954 |
In 1954 (Showa 29), Yokohama Prince Hall opened. |
| 1954 |
Yokohama Prince Hall opened. |
| 1955 |
In 1955 (Showa 30), Akasaka Prince Hotel opened. |
| 1955 |
The terminal building of Tokyo International Airport (Haneda Airport) opened. |
| 1956 |
In 1956 (Showa 31), Yunohana Golf Course opened. |
| 1956 |
A department store rush took place in Ikebukuro, featuring Seibu, Tobu, and Mitsukoshi. |
| 1957 |
In 1957 (Showa 32), Hakone Komagatake Cable Car opened. |
| 1957 |
Oiso Long Beach opened for business. |
| 1958 |
Shinjuku Prince Hotel opened. |
| 1959 |
In 1959 (Showa 34), Sayama Ski Resort opened. |
| 1959 |
Sayama Ski Resort opened. |
| 1961 |
In 1961 (Showa 36), Naeba International Ski Resort began operations. |
| 1961 |
Naiwa International Ski Resort opened for business. |
| 1962 |
Seibu Motor began operating a one-man car service between Tokorozawa and Shin-Tokorozawa in 1962 (Showa 37). |
| 1962 |
Seibu Motors began one-man car service between Tokorozawa and Shin-Tokorozawa. |
| 1963 |
The first condominium boom occurred. |
| 1964 |
The Tokyo Olympics were held, the Tokaido Shinkansen opened, and overseas travel liberalization was implemented. |
| 1966 |
In 1966 (Showa 41), the Seibu Railway Ice Hockey Club was established, and the Japan Ice Hockey League was inaugurated in the same year. |
| 1966 |
Japan's total population surpassed 100 million. |
| 1968 |
Japan's GNP became second only to the United States. |
| 1969 |
In 1969 (Showa 44), with the opening of the Seibu Chichibu Line of Seibu Railway, Seibu's first limited express, the first Red Arrow, began operation. |
| 1969 |
With the opening of the Seibu Chichibu Line, Seibu Railway's first express, the Red Arrow, began operation. |
| 1970 |
In 1970 (Showa 45), Seibu Real Estate Co., Ltd. was established, and the subdivision of Kamakura Zushi Highland was started. |
| 1970 |
Seibu Real Estate Co., Ltd. was established, and sales of Kamakura Zushi Highland began. |
| 1971 |
In 1971 (Showa 46), Karuizawa 72 Golf began business. |
| 1971 |
Karuizawa 72 Golf opened for business. |
| 1972 |
In 1972 (Showa 47), the Land Planning Ice Hockey Club was established, and activities began based at the Karuizawa Skating Center. |
| 1972 |
The National Land Planning Ice Hockey Club, based at Karuizawa Skate Center, was founded. |
| 1973 |
In 1973 (Showa 48), Shimoda Prince Hotel opened. |
| 1973 |
Shimoda Prince Hotel opened, and Izu Mutsu Sea Paradise was newly renovated and opened. |
| 1974 |
In 1974 (Showa 49), BIG BOX Takadanobaba Seibu Sports Plaza opened in Shinjuku, Tokyo. |
| 1974 |
BIG BOX Takadanobaba Seibu Sports Plaza opened in Shinjuku, Tokyo. |
| 1977 |
In 1977 (Showa 52), Shinjuku Prince Hotel opened in Kabukicho, Tokyo. |
| 1977 |
Shinjuku Prince Hotel opened in Kabukicho, Tokyo. |
| 1978 |
In 1978 (Showa 53), Shinagawa Prince Hotel and Hakone Prince Hotel opened. |
| 1978 |
In 1978 (Showa 53), the Seibu Lions, based in Tokorozawa, Saitama Prefecture, was born. |
| 1978 |
Shinagawa Prince Hotel, Sunshine City Prince Hotel, and Hakone Prince Hotel opened. |
| 1978 |
Seibu Lions were founded. |
| 1979 |
In 1979 (Showa 54), Prince Hotel Baseball Club was established. |
| 1979 |
The Prince Hotel baseball team was established. |
| 1982 |
The Tohoku Shinkansen and Joetsu Shinkansen were opened. |
| 1983 |
In 1983 (Showa 58), Seibu Yurakucho Line was born, assuming the integration of Seibu Railway and the Tokyo Metro Yurakucho Line. |
| 1983 |
The Seibu Yurakucho Line, which is based on Seibu Railway and the Yurakucho Line of the subway, was established. |
| 1985 |
Prince Hotel became a wholly-owned subsidiary of the National Land Planning Agency. |
| 1987 |
Japanese National Railways was split and privatized into JR. |
| 1990 |
In 1990 (Heisei 2), Yokohama Hakkeijima Inc. was established, and in 1993 (Heisei 5), opened the Yokohama Hakkeijima Sea Paradise. |
| 1990 |
In 1990 (Heisei 2), Hawaii Prince Hotel Waikiki (Hawaii, Oahu, now Prince Waikiki) began operations. |
| 1990 |
Yokohama Hakkeijima opened. |
| 1992 |
In 1992 (Heisei 4), Land Planning Inc. changed its name to Kokudo Co., Ltd. |
| 1992 |
In 1992 (Heisei 4), Shin-Yokohama Prince Hotel opened. |
| 1992 |
National Land Planning Co., Ltd. changed its name to Kokudo Co., Ltd. |
| 1994 |
In 1994 (Heisei 6), Takanawa Prince Hotel Sakura Tower (now The Prince Sakura Tower Tokyo) began operations. |
| 1994 |
Tokyo Skytree opened. |
| 1995 |
In 1995 (Heisei 7), the West and East of Karuizawa Prince Shopping Plaza opened. |
| 1995 |
The Hanshin-Awaji Great Earthquake occurred. |
| 2000 |
In 2000 (Heisei 12), Seibu Shōji launched the parking business |
| 2004 |
A scandal involving Seibu Railway was uncovered, leading to its delisting. |
| 2004-12-17 |
On December 17, 2004 (Heisei 16), Seibu Railway was delisted from the Tokyo Stock Exchange. |
| 2005 |
Seibu Holdings was established as part of a group reorganization. |
| 2006 |
In 2006 (Heisei 18), the group reorganization procedures were completed and Seibu Holdings was established. |
| 2006 |
In 2006 (Heisei 18), Prince Hotel was absorbed and merged with Kokudo as a surviving company, and continued until it became a 100% wholly-owned subsidiary of Seibu Holdings. |
| 2008 |
The Japanese version of Twitter was launched. |
| 2011 |
The Great East Japan Earthquake occurred. |
| 2012 |
Tokyo Skytree opened. |
| 2014-04-23 |
On April 23, 2014 (Heisei 26), Seibu Holdings was listed on the First Section of the Tokyo Stock Exchange. |
| 2014-04-23 |
Seibu Holdings was listed on the First Section of the Tokyo Stock Exchange. |
| 2016 |
In 2016 (Heisei 28), Seibu Railway began operating the Seibu traveling restaurant '52 Seats of Bliss'. |
| 2016 |
In 2016 (Heisei 28), Seibu Properties opened the mixed-use facility 'Tokyo Garden Terrace Kioi-cho'. |
| 2016 |
In 2016 (Heisei 28), Prince Hotel opened 'The Prince Gallery Tokyo Kioi-cho'. |
| 2016 |
Seibu Railway began operating the Seibu traveling restaurant '52 Seats of Bliss'. |
| 2016 |
Seibu Properties opened the mixed-use facility 'Tokyo Garden Terrace Kioi-cho'. |
| 2017 |
In 2017 (Heisei 29), the first Prince Hotel in Nagoya, 'Nagoya Prince Hotel Sky Tower', was opened. |
| 2017 |
Nagoya Prince Hotel Sky Tower opened. |
| 2018 |
In 2018 (Heisei 30), Seibu Railway began operating the new 001 series (Laview) limited express cars. |
| 2018 |
In 2018 (Heisei 30), Seibu Properties opened Phase I of Gran Emio Tokorozawa. |
| 2018 |
Seibu Railway began operating the new 001 series (Laview) limited express cars. |
| 2020 |
In 2020 (Reiwa 2), Toshimaen closed after 94 years of operation. |
| 2020 |
Toshimaen closed. |
