这个是一个日本用户的元数据，是否可以用name来判断是否包含片假名，来检测是否是日本用户？

{"id":"1ede94a90be721b027eac95b6671547d2938b0b3a57bbc36c405d829766c41d3","kind":0,"pubkey":"269e6f57aa9a200c814e6b98721819dde038ca60c0390b87b658d300ab6d0d04","tags":[],"created_at":1679053245,"content":"{\"name\":\"ゆうひまわり\",\"nip05\":\"yuuhimawari@yuuhimawariero.net\",\"picture\":\"\",\"banner\":\"\",\"about\":\"illust/イラスト/格ゲー\",\"lud06\":\"\",\"lud16\":\"itchyfood23@walletofsatoshi.com\",\"display_name\":\"ゆうひまわり\",\"nip05valid\":true,\"webOfTrustScore\":11.799999999999974,\"followingCount\":179,\"followersCount\":135}","sig":"fe55e192413ff26d94ed966564a6a0278f15b7e5414f06038b7440e28ec650574006573c90e6e95e78cb4f4e5923c3c077a61972389f993eebbf35caff41124b"}