Though from 2019 that was interesting to read, or to be reminded of. But it lacked mention of https://duckduckgo.com/q=tokyo+storm+water+caverns https://duckdu

Though from 2019 that was interesting to read, or to be reminded of. But it lacked mention of https://duckduckgo.com/q=tokyo+storm+water+caverns https://duckduckgo.com/q=tokyo+storm+water+caverns which surely are connected, and essential for making that successful?