I'm not sure if this has been posted before, but only found out today that Kawamori designed a watch for Sony a few years ago.
https://shojikawamori.jp/en/works/wena-wrist-2020/
I'm actually more intrigued by the promotional video, which has another aircraft specially designed for the watch. The jet really looks like an amalgam of his other works, but I thought the most prominent feature is the rear stabiliser that looks very similar to the Thunderbird Shadow, which he also designed.
Here's the video (weird there's no audio, but perhaps its due to song copyrights):