Ch. 03 · Life-cycle economics Deck · Rehabilitation vs. Demolition
Kurokawa Archive
Tokyo · Ginza-8 Rev. 04 / 2024·11
3.4 Slide

Capsules don't wear out. Buildings around them do.

Cost per m² · JPY Life-cycle basis
140 units · 50 yrs
Design intent · 25 yr swap · Actual · 50 yr
0/140
Capsules ever swapped between 1972 and 2022 demolition, against a spec that budgeted a full replacement every twenty-five years.
Swap rate · 0.00 / yr
Core lifespan
50 yr
Capsule spec
25 yr
Cost per m² across five swap scenarios · Nakagin-class megastructure
Modelled Context
¥ 1,200k ¥ 960k ¥ 720k ¥ 480k ¥ 240k ¥ 0 ¥ 1,040k ¥ 720k ¥ 470k ¥ 355k ¥ 210k Demolish · rebuild Core retain Capsule swap Refurbish in-situ Defer Ginza-6 · 2019 Aoyama · 2016 Modelled 2025 Shinbashi · 2021 Do-nothing −55% vs. demolish · rebuild
N = 5 scenarios · Tokyo Metro. Ginza & Shinbashi comparables · 50-yr amortisation
Model · KA-LC / 2024.11
Source · Kurokawa Archive life-cycle model 2024, cross-checked against Tokyo Metropolitan Construction Cost Index Q3 · 2024, and post-mortem study of five Ginza-district megastructures 2016 – 2022.
中銀 · 生命周期試算
Kurokawa Archive 03 · 12
This is the Nakagin Capsule Tower design system, applied by Curio — a design-style library for AI agents. Full Nakagin Capsule Tower guide → designbycurio.com/learn/nakagin-capsule-tower-1972