I've been watching Sanadamaru which is a Japanese historical television series.
I've been watching a Japanese historical television series called Sanadamaru.
ご質問ありがとうございます。
・「I've been watching Sanadamaru which is a Japanese historical television series.」「I've been watching a Japanese historical television series called Sanadamaru.」
(例文)I've been watching Sanadamaru which is a Japanese historical television series.// Oh. Do you like it?
(訳)私は最近、歴史ドラマの真田丸を見ています。//どうですか?(好きですか?)
・歴史ドラマはa Japanese historical television seriesです。
televisionを省略してTV seriesという事もできます。
(例文)This is a Japanese historical television series.
(訳)これは歴史ドラマです。
お役に立てれば嬉しいです。
Coco