To say 'comic book' in Japanese, you can go with either '婕敾鏈 (manga hon)' which is a more traditional expression or '銈炽儫銉冦偗銉栥儍銈 (komikku bukku)' which is a direct borrowing from English and is becoming more common.
To say 'comic strip' in Japanese, it's usually 銈炽儫銉冦偗銈广儓銉儍銉 (komikkusutorippu). But there are variations depending on the context. For example, 婕敾銇偣銉堛儶銉冦儣 (manga no sutorippu) could also be used.