Alone in my room is a song by Takagi Masa from her 1973 single Alone in my room.

Note: I had originally posted the song lyrics on this video more than a year ago under the username @vadasambar. This is a copy/paste of the comment there.

今一人部屋の隅にいて
今一人膝を抱いて眠る
ギターの爪弾き
それは昨日
甘い囁き
それは明日
Right now, alone in the corner of the room
Right now, alone I hold my knees and sleep
Playing guitar with hands
That was yesterday
Sweet whispers
That is tomorrow

今一人部屋の隅にいて
今一人思うあなたのこと
今一人ソファー横になって
今一人時計眺めている
Right now, alone in the corner of the room
Right now, alone I think of you
Right now, alone I lay on the sofa
Right now, alone looking at the watch

おやすみなさい
それは昨日
いつもの駅で
それは明日
Goodnight
That was yesterday
At the same station as always
That is tomorrow

今一人ソファー横になって
Right now, alone laying on the sofa

今一人思うあなたのこと
Right now, alone I think of you

ララララララ・・・・・
Lalalalalala….