Tower of the Sun: Inside Osaka's Iconic 1970 Expo Monument & Symbol of Japan's Bold Future

Standing 70 meters tall in the heart of Expo ’70 Commemoration Park, the Tower of the Sun (太陽の塔) is one of Japan’s most surreal and unforgettable landmarks. Created by avant-garde artist Taro Okamoto for the 1970 Osaka World Exposition, this striking monument features three faces representing the past, present, and future. What makes it truly special? You can now venture inside to experience the mind-bending “Tree of Life” installation that was hidden from public view for decades. No matter how many times you see it, the impact never fades. The interior Tree of Life is absolutely mesmerizing, and the surrounding lawns are perfect for a relaxing picnic.

The Verdict

Absolutely worth visiting! The Tower of the Sun is a must-see for anyone interested in Japanese art, 1970s retro-futurism, or simply experiencing something completely unique. The interior tour is a surreal journey through evolution and human imagination. Book in advance if possible, though weekday walk-ins are sometimes available. Even if you can’t get inside, viewing the tower from the park grounds is incredibly powerful and photogenic.

Tourist Quick Check

Why Locals Love It

The Tower of the Sun is deeply embedded in Osaka’s cultural identity. For locals who remember the 1970 Expo, it represents a golden era of optimism and Japan’s post-war economic miracle. Taro Okamoto’s philosophy—”Art is an explosion!”—is perfectly embodied in this audacious structure that defied convention by piercing through the roof of the main pavilion. When the interior reopened to the public in 2018 after 48 years, it became a sensation, allowing new generations to experience Okamoto’s vision of life’s evolution from primordial organisms to humanity. The park itself is beloved as a spacious green oasis perfect for family outings, picnics, and seasonal flower viewing.

Key Highlights

• The Three Faces: Golden Face (future) on top, Sun Face (present) in the center, and Black Sun (past) on the back—each with distinct expressions
• Tree of Life Interior: A 41-meter-tall spiral installation featuring 183 models of life forms from different evolutionary periods
• Underground Sun: The mysterious basement level with its otherworldly atmosphere and lighting
• Trilobite Era to Reptile Era: Each floor represents different evolutionary stages with stunning creature models
• Photo-friendly Spiral Staircase: Rent a special phone case (¥500) to photograph throughout the interior
• Museum Shop: Exclusive Tower of the Sun merchandise and Taro Okamoto art goods
• Expo ’70 Park Grounds: Spacious lawns perfect for picnicking with the tower as your backdrop

Honest Warnings

• Advance Reservations Essential: Interior tours require booking (usually by the day before). Same-day tickets exist but aren’t guaranteed, especially on weekends
• Physical Demands: The tour involves climbing spiral staircases from basement to upper levels—challenging for those with mobility issues. Small elevators are available but require advance notice
• Limited Photography: Only ground floor photography is free; you must rent a special phone case (¥500) to shoot on upper levels
• Staff Attitude Varies: Some visitors report reception staff can be unhelpful or unclear about procedures—be patient and ask questions
• Closed Wednesdays: The tower is closed every Wednesday, so plan accordingly
• Separate Park Admission: You need to pay Expo ’70 Park entrance fee in addition to the tower ticket
• Location: About 30-40 minutes from central Osaka via Midosuji Subway Line and Osaka Monorail—factor in travel time
• Limited Time Inside: Tours are self-guided but timed; you’ll have about 30 minutes to explore the interior