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The Akashi City Astronomical Science Museum, located in Akashi City, Hyogo Prefecture, is a science museum centered around the themes of "Time and Space." Its most significant feature is its location exactly on the 135-degree east longitude line, which marks the Japan Standard Time (JST) meridian. The museum's landmark is a striking 56-meter-tall tower clock with a 40-meter observation deck, a beloved symbol of Akashi. Equipped with a planetarium and astronomical observation facilities, the museum offers programs and exhibits that allow visitors to learn about the mechanics of the universe and the history of time.
Opened in 1960, this museum is recognized as one of the earliest astronomical science museums in Japan. Throughout its history, it has weathered significant events, including damage from the 1995 Great Hanshin-Awaji Earthquake, leading to its reopening in a renovated form in 1998. The tower clock was a gift from Seiko Holdings; while the second generation of the clock famously stopped at the exact moment of the earthquake, the current third-generation clock has been updated with LED technology and continues to keep precise time. The building itself serves as a vital cultural symbol for the local community.
The museum features diverse exhibits on the solar system and various astronomical materials. A highlight is the planetarium, which occasionally features unique programs combining traditional manual projection with modern auxiliary projectors. On the 16th floor, the astronomical observation room houses a 40cm aperture reflecting telescope. The museum hosts celestial observation events approximately once a month, providing rare opportunities to observe actual celestial bodies. Additionally, the exhibits regarding the Japan Standard Time meridian and the history of time-keeping offer a unique educational experience.
While astronomical observation is primarily a nighttime activity, the museum holds special observation events about once a month. It is important to check the nighttime schedule in advance if you plan to participate. Depending on the season, special exhibits or events related to specific celestial phenomena may be held. Since planetarium programs are also conducted during the day, the museum is an excellent addition to a daytime sightseeing itinerary. Please note that a major renewal is scheduled for July 30, 2026, which is expected to bring even more advanced exhibits.
Beyond the star projection in the planetarium, the museum offers hands-on astronomical observation programs. In the past, it has even hosted unique events like the "Deep Sleep Planetarium." Through its exhibits, visitors can learn how humanity has measured time through various clocks, calendars, and methods of time expression. Using the telescope during observation sessions provides a profound way to deepen one's understanding of the cosmos.
The area around the museum features several spots to experience the culture and nature of Akashi. Nearby attractions include Maruyama Park, the historic Kakimoto Shrine, and Gessho-ji Temple. Additionally, near Akashi Station, you can visit the "Uonotana Shopping Street" to enjoy the famous local seafood. A great way to visit is to combine a scientific learning experience at the museum with a stroll and a seafood meal in the surrounding neighborhood.
If you plan to participate in nighttime astronomical observation events, it is highly recommended to bring a jacket or warm clothing to protect against temperature changes. Within the exhibition areas, please check local signage regarding photography restrictions. While payments can typically be made via cash, credit cards, or transit IC cards, policies may vary by event, so checking in advance is advised. For English-language support, please consult the official website or onsite staff. For a smooth experience, please maintain a quiet environment during planetarium sessions.