"arashi" can refer to a number of things. Check the current list of arashi* tags to see if there is a more specific one that fits what you are trying to tag.

Some of the more popular tags from the list include...

Artists

• arashidrgn
• arashi-h

Characters

• arashiin
• arashi_(leobo)
• arashi_maeda
• arashi_kumo
• arashio_(azur_lane)
• arashi_(lagoon_lounge)

Copyrights

• arashigato

...but check the complete list if the one you want isn't listed here.