Appearance
Akiichiro has lightly tanned skin, short brown hair and small dark-colored eyes. Compared to other characters in the series Akiichiro has a very bulky figure, though more of his bulk is attributed to body fat as opposed to muscle. He also grows a very slightly accentuated moustache on his upper lip.
Personality
While his personality is never fully elaborated on in the film, it is shown in the introduction to the film that he is extremely overconfident and brave, driving his car through an undeveloped footpath after missing a turn. His curiosity, love for adventure and general carelessness first lands him and his family at the entrance the tunnel of the Spirit World and subsequently places him under a curse.
History
Not much is known about Akiichiro's past except for the fact that he and his family have decided to move from an unnamed location to the suburbs. Unfamiliar with the roads there, Akiichiro misses a turn and compensates by driving over a footpath in hopes to eventually reach his new house. He nearly drives the car into a stone statue and revels in the architectural beauty of the Spirit World Tunnel. Curiosity piqued, Akiichiro then takes Ichiyuko and Chihiro through the tunnel, unwittingly stepping into the Spirit World.
Akiichiro is later seen picking up a scent of food and, with wife and daughter in tow, finds a whole street of unoccupied food stalls. Thinking that all expenses would be paid for (due to his owning of credit cards), Akiichiro and Ichiyuko begin to stuff themselves with food meant for spirits and immediately fall under a curse that prevents them from stopping. Akiichiro is then seen at sunset where his consumption of the food has transformed him and his wife into large pigs. Whipped by angry spirit stall owners for eating so much food, Akiichiro consequently forgets his previous life as a human.
Abilities
His abilities are not really shown throughout the film, but he is a gifted person in that he is able to smell food from a long distance.