Tower of the Sun (Expo '70 Park)

Reached via the Osaka Monorail from Senri-Chuo (Midosuji line terminus) — about 30–40 minutes total from central Osaka. The tower stands alone in a vast open plaza, the only major structure left from Expo ‘70.

Inside, you ascend the hollow core past the Tree of Life, a tiered sculpture covered in models of organisms from amoebas to dinosaurs, soundtracked by atmospheric music. It’s a Metabolist-era artifact — utopian, biological, slightly unhinged — and there’s nothing else like it in Japan.

The Tower of the Sun was Taro Okamoto’s contribution to the Theme Pavilion at the 1970 Japan World Exposition — he called it “a deliberate contradiction” of Expo’s modernist architecture, refusing to produce something sleek or optimistic. The three faces represent three temporal registers: the golden mask facing skyward (the future), the sun face on the front (the present), and the Black Sun carved into the tower’s back (the past/prehistory). The fourth face — the golden arms extended outward — is the form itself. The interior was closed and sealed in 1970 after the Expo ended and was not reopened until March 2018, 48 years later.

The internal experience is a one-way 30-minute ascent through 145 steps and 5 staircase sections, following the “Tree of Life” installation that extends 41 meters through the tower’s hollow core. The tree model depicts 4 billion years of biological evolution, from single-celled organisms at the base through fish, amphibians, reptiles, mammals, and primates — approximately 3,000 creature models attached to the branches. The soundtrack reinforces the primordial atmosphere. It is deliberately overwhelming.

Hours: Interior 10:00–17:00 (last admission 16:30), closed Wednesdays. Advance reservations via the official website strongly recommended — weekends sell out well ahead. Admission: Tower interior ticket covers both the interior and the base level. The surrounding Expo ‘70 Commemorative Park charges a separate ¥450 admission and has Japanese gardens, a natural history museum, and the original Festival Plaza. The park’s sakura blooming in late March is excellent and less crowded than central Osaka spots. Access: Osaka Monorail to Bampakukinenkoen Station. From central Osaka, take the Midosuji Line to Senri-Chuo then transfer to the monorail (30–50 min total, ¥500–700).