https://app.rakuten.co.jp/services/api/IchibaItem/Search/20220601?applicationId=b81babe0dea9170ecdaf3c019d8709b6&affiliateId=0433111a.0d75cb85.0433111b.a7f1907e&keyword=%E3%80%90%E9%80%81%E6%96%99%E3%83%BB%E7%B4%99%E7%AE%B1%E8%BE%BC%E3%81%BF%E3%83%BB%E8%AA%AC%E6%98%8E%E4%BB%98%E3%81%8D%E3%80%91%E3%82%B5%E3%83%B3%E3%83%BB%E3%83%B4%E3%82%A1%E3%83%AC%E3%83%B3%E3%83%86%E3%82%A3%E3%83%B3+%E8%B5%A4%E3%83%BB%E7%99%BD+2%E6%9C%AC%E3%82%BB%E3%83%83%E3%83%88+SV1-1&format=json&formatVersion=2&hits=10&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
)