Recently I came over a great Regex expression for sorting out Japanese keywords. I have never seen this on StackOverflow and it is really something I’ve been searching for. I must say I was really surprised finding this, because I didn’t think it existed!
Regex Expression below
([\(（「『]+.*?[\)）」』]|\ |<br>|[a-zA-Z0-9]+\.[a-z]{2,}|[一-龠々〆ヵヶゝ]+|[ぁ-んゝ]+|[ァ-ヴー]+|[a-zA-Z0-9]+|[ａ-ｚＡ-Ｚ０-９]+)
Same code as above but without the br tag and non-breakable space character entity reference.
/([\(（「『]+.*?[\)）」』]|[a-zA-Z0-9]+\.[a-z]{2,}|[一-龠々〆ヵヶゝ]+|[ぁ-んゝ]+|[ァ-ヴー]+|[a-zA-Z0-9]+|[ａ-ｚＡ-Ｚ０-９]+)/g;
Example JavaScipt Code with the Regex in action
const regex = /([\(（「『]+.*?[\)）」』]|\ |<br>|[a-zA-Z0-9]+\.[a-z]{2,}|[一-龠々〆ヵヶゝ]+|[ぁ-んゝ]+|[ァ-ヴー]+|[a-zA-Z0-9]+|[ａ-ｚＡ-Ｚ０-９]+)/g;
const str = `【AFP＝時事】新型コロナウイルスのパンデミック（世界的な大流行）が7月に入って急加速していることが、各国・機関のデータを基にしたAFPの集計で明らかになった。
`;
let m;
while ((m = regex.exec(str)) !== null) {
// This is necessary to avoid infinite loops with zero-width matches
if (m.index === regex.lastIndex) {
regex.lastIndex++;
}
// The result can be accessed through the `m`-variable.
m.forEach((match, groupIndex) => {
console.log(`Found match, group ${groupIndex}: ${match}`);
});
}