It's not a desperate move on his part. He won silver at Japanese nationals in 2018 -
he could have gone to Worlds, but he chose not to. If it's "desperation" on anyone's part, it's the Japanese federation, who I'm sure would really like to build more of a dance program, if only for the team events. And even there, it may not be that they think that this new partnership will win any medals - what they'll very likely do is get more Japanese skaters interested in dance, and that'd be great on its own. And if nothing else, it gets a partner for a Japanese ice dancer who is currently without partner - and a partner who can compete with her internationally, including at the Olys. No citizenship issues, no need to give Ukraine an SUV in exchange for a male partner...
Daisuke wins silver, turns down World's spot