| The "Budgets" page in JAXA website([1], will quote below) indeed don't have a detailed breakdown: | Project name | Total development cost(projected) | Total development cost(as of Jan, Reiwa 5) | Planned launch fiscal year | Project phase | State of Project (total dev. cost, launch FY changes, etc.) | References | | Small Lunar Lander Proving Craft(SLIM) | 180 oku-yen(~$121m) | 149 oku-yen(~$100.7m) | FY Reiwa 5 (FY2023) | Phase D (Production/testing phase) (snip) | March, Heisei 28: Project migration review at JAXA (...snip...) March, Heisei 30: At JAXA, changes of plan due to change in launch vehicle(Epsilon -> H-IIA rideshare), as well as change in launch dates. Incorporating the results, adjusted total development cost. (180 oku-yen -> 149 oku-yen) (...snip...) | (snip) | There are few more media sources[2][3] that state 149 oku-yen[4] figure covers "part of the launch and initial operation". One of such articles[3] estimates Epsilon launch cost as 50 oku-yen or ~$35m, and theorizes change to H-IIA to be intending to save launch cost. Not sure if there are readily available English source, sorry for that - very few of us think in English and these deep topics rarely have English coverage. 1: https://www.jaxa.jp/about/transition/index_j.html 2: https://newswitch.jp/p/345 3: https://moonstation.jp/blog/lunarexp/slim/slim-launche-to-be... 4: 1 oku means 0.1 billion, 1 USD is ~150 yen, so 1 oku-yen is ~0.75 million dollar |