https://app.rakuten.co.jp/services/api/IchibaItem/Search/20220601?applicationId=b81babe0dea9170ecdaf3c019d8709b6&affiliateId=0433111a.0d75cb85.0433111b.a7f1907e&keyword=%E3%80%90%E3%83%99%E3%83%AB%E3%83%A1%E3%82%BE%E3%83%B3%E3%80%91%E3%80%90%E3%83%97%E3%83%BC%E3%83%AB%E3%83%BB%E3%81%8A%E9%A2%A8%E5%91%82%E6%99%82%E3%81%AB%E5%A4%A7%E6%B4%BB%E8%BA%8D%E3%80%91%E5%90%B8%E6%B0%B4%E3%82%A2%E3%83%8B%E3%83%9E%E3%83%AB%E3%82%AD%E3%83%83%E3%82%BA%E3%82%AD%E3%83%A3%E3%83%83%E3%83%97&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
)