21st Century Museum of Contemporary Art — Circular Museum of Light & Space

**Swimming Pool strategy:** The 'Swimming Pool' installation has two viewing points — above (free zone, always accessible) and below (paid zone, 10:00–18:00). To maximize the illusion, coordinate with a friend: one person goes below while the other stays above, creating interactive moments where you 'touch' through the glass. Weekday mornings (10:00–11:00) offer minimal crowds for photography. The installation works best with natural light (cloudy days create even illumination; harsh sun creates reflections). The blue pool liner and rippling water create the perfect illusion of underwater depth. **James Turrell 'Blue Planet Sky' room:** This permanent installation is a square room open to the sky — you lie on a white bench and observe the sky through a square aperture. As you watch, the sky's color intensifies to impossible blue due to the framing effect (Turrell's specialty: manipulating perception of light). Visit at different times of day: dawn's soft light, midday's intense blue, dusk's orange-pink transitions, or night when stars appear. Sessions are untimed — you can stay as long as desired. This meditative experience offers profound pause within the museum visit. The room is in the paid zone; check the museum map for location (it's easy to miss). **Rotating exhibitions vs permanent collection:** The museum stages 3–4 major rotating exhibitions annually featuring contemporary Japanese and international artists. Check the website before visiting to see current exhibitions — these often showcase cutting-edge video art, installation, and interactive media not seen elsewhere in Japan. If the rotating exhibition doesn't interest you, the permanent collection and architecture alone justify the ¥450 entry. The museum shop (free zone) sells excellent art books, limited-edition prints, and design objects — browsing is worthwhile even without museum entry.