This song is "Que Sera Sera" composed by Omori Motoki of Mrs. GREEN APPLE.
It recently won the Japan Record Award. Personally, I think it's a very rich song, incorporating elements of Celtic music and including changes in key. As such, it's quite difficult to perform.
This is the ultra-professional level in E♭ version.
It's difficult to make the most of Omori's high tones and wide range, but this version is the most recommended! Of course, there is also a version an octave lower, so don't push yourself and choose one that suits your level!
この曲はMrs.GREEN APPLEの大森元貴作曲『ケセラセラ』です。
先日日本レコード大賞も受賞しています。個人的にはケルト音楽の要素も取り入れ、調性の変化も含めかなり内容の濃い曲となっています。その分演奏もかなり難しいです。
こちらは超プロ級inE♭ ver.です。
大森氏のハイトーン、音域の広さを活かすには難しいですが、このver.が1番オススメです!オクターブ下も勿論ありますので無理はせず、ご自分のレベルに合わせて下さい!