Trying NOT to match a Japanese word using RegEx negative lookbehind

You need to avoid matching the numbers after a digit or digit + the separator, so you need to add (?<![０-９0-9])(?<![０-９0-9][，,、]) right after (?<!次の):

(?<!検索結果：)(?<!次の)(?<![０-９0-9])(?<![０-９0-9][，,、])(?:[〇一二三四五六七八九十百千万億兆0-9０-９]|京+)[,，、]?.+[〇一二三四五六七八九十百千万億兆京0-9０-９].+件
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

See the regex demo.