Is it permissible for a trainer to return to karate training despite the presence of the temptation of women, striking the face which is permissible in the rules of the game, and the presence of the salute of loyalty and obedience to the trainer that the players utter at the beginning of any movement?

It is permissible to work as a coach for this game, subject to the following controls:

1. Avoid Buddhist and Indian religious rituals, such as bowing in greeting and words that indicate absolute loyalty, for the Prophet, peace and blessings be upon him, said: "Whoever imitates a people is one of them."

2. Do not play the game in places where women are present, for the Prophet, peace and blessings be upon him, said: "I have not left behind me any fitna (trial) more harmful to men than women."

3. Avoid striking the face, for the Prophet, peace and blessings be upon him, said: "When one of you fights, let him avoid the face."

4. The game should not lead to neglecting a duty or committing a forbidden act.

If the intention is to teach Muslims to strengthen their bodies and defend themselves, then this would be an act of proximity to Allah. Not teaching it does not incur any legal blame.