This is the 36th most frequent Japanese word.
へ
The Japanese word "へ" is a particle indicating direction or destination, meaning "to" or "toward."
In this sentence, 'へ' indicates the destination to which the subject is moving or heading, showing directionally towards the target location.
私は東京へ行きます。
I am going to Tokyo.
Here, 'へ' specifies the recipient or the directionality of the action described by the verb, showing who receives the letter.
彼は友達へ手紙を書きました。
He wrote a letter to his friend.
In this sentence, 'へ' conveys metaphorical direction or aim, indicating towards what concept or goal the action is oriented.