https://app.rakuten.co.jp/services/api/IchibaItem/Search/20220601?applicationId=b81babe0dea9170ecdaf3c019d8709b6&affiliateId=0433111a.0d75cb85.0433111b.a7f1907e&keyword=%E3%83%AB%E3%83%94%E3%82%B9+%E3%83%9E%E3%82%B9%E3%82%AF%E3%83%81%E3%82%A7%E3%83%BC%E3%83%B3+%E3%83%AC%E3%83%87%E3%82%A3%E3%83%BC%E3%82%B9+%E3%83%9E%E3%82%B9%E3%82%AF%E3%82%B9%E3%83%88%E3%83%A9%E3%83%83%E3%83%97+%E3%82%B9%E3%83%88%E3%83%A9%E3%83%83%E3%83%97+%E3%82%AB%E3%83%A9%E3%83%95%E3%83%AB+%E3%83%93%E3%83%BC%E3%82%BA+%E3%81%8B%E3%82%8F%E3%81%84%E3%81%84+%E9%9F%93%E5%9B%BD%E3%81%A3%E3%81%BD+%E3%82%AA%E3%83%AB%E3%83%81%E3%83%A3%E3%83%B3+LUPIS&format=json&formatVersion=2&hits=5&page=1&sort=standard

URL_rss=XMLを見てみる。

stdClass Object
(
    [GenreInformation] => Array
        (
        )

    [Items] => Array
        (
        )

    [TagInformation] => Array
        (
        )

    [carrier] => 0
    [count] => 0
    [first] => 0
    [hits] => 0
    [last] => 0
    [page] => 1
    [pageCount] => 0
)