When I told mrguy that this had contained shiso candy he said something to the effect of "When I see this guy that's definitely what I think is in the package", so I looked him up. When I asked Google AI for more information about Shio-Konbucho, this is what it told me:
"Shio-Konbucho (塩こん部長), which translates to "Salt Kelp Manager," is the highly successful, dramatic mascot for the Kurakon Foods Corporation. First introduced onto packaging by the marketing department in 2007, the character single-handedly reversed stagnant product sales and sparked consecutive years of double-digit growth.
Key Facts About the Character
The Dramatic Persona: He is illustrated in a classic, intense, thick-lined gekiga manga style. He wears a standard salaryman suit and tie, usually with his jacket slung over his shoulder or making an intensely passionate face while discovering a new food combination.
The Name Pun: His name is a deliberate Japanese wordplay (pun) combining Shio Kombu (salted kelp) and Bucho (department manager).His Corporate "Role": According to Kurakon, he is a highly talented General Manager whose entire job is coming up with creative recipe suggestions to show how versatile savory seaweed can be in everyday cooking.
Interactive Marketing: The character has an active social media presence in Japan where he "replies" to customer comments using a commanding corporate-boss tone while sharing recipes. He also regularly stars in live-action television commercials portrayed by actors.Collaborations: Beyond traditional kelp bags, his massive popularity has allowed him to branch out into collaborative snack items like the Daimaru Honpo Plum Candy shown in your image, as well as limited-edition corn snacks."