Komajiro is a Komainu who more closely resembles a shiba inu. His fur is ochre-colored with a cream patch around his muzzle and stomach; his inner-ears and tail are a darker shade of ochre. He has light blue eyes and brown swirls on his cheeks and hips. Similar to his brother, he has long, brown, flaming eyebrows which resemble Hitodama flames. He also carries a blue pouch adorned with a swirl pattern.
In Yo-kai Watch 2: Bony Spirits, Komajiro has an uncommon form that is different than his original appearance. The swirl on his belly is swapped and he has a skill change named Lightning Up!.
Komajiro is similar to Komasan in that he's curious and optimistic. Though unlike his brother he adapts much quicker to urban life to the point that it renders Komasan a tad jealous. He picks up city lingo, smartphone skills, and even manages to become a DJ at a nightclub where he adopts the nickname of KJ, gets a girlfriend and still expects more from his brother.
Despite being more skilled than his brother he still sees Komasan as impressive and inspirational to him. He and Komasan live together in a small house and the pair regularly go out on adventures around the city and beyond.
Komajiro's Yo-kai Cam tip implies that whomever he inspirits can't seem to find what they're looking for.
Komajiro appears inside the Old Mansion behind the Rank D Watch Lock at Blossom Heights. Komajiro can also be freed from the Crank-a-kai with a Pink Coin.
Yo-kai Watch 2
Komajiro can be found with the Yo-kai Watch on D-Rank under cars and blue vending machines in Blossom Heights. Komajiro can also be found in the "Gate of Whimsy" (Toys iZ We).
Komajiro can also be found at Bony Spirits Way Gogo Junction inside Mystery Way as of the Oni Evolution Update.
Yo-kai Watch Blasters
Komajiro is an auto befriend after clearing Chapter 3
Yo-kai Watch 3
Komajiro is an auto befriend obtained in Chapter 9 after beating Rongo Swirll
Komajiro as well as his brother can also be found in the Blasters-T's Enma Palace
Komajiro can also be found through the Crank-a-kai after landing on a white space with the Legend Coin.
Komajiro was first mentioned in Here's Komasan by his brother Komasan when he came to the city. Komasan was waiting for him but never got the chance to find. Komajiro officially appeared in Komasan In The City: Here's Komajiro! when he and Komasan meet each other.
Komajiro is mainly featured in the mini-corners alongside Komasan, although, they appear in Nathan's segments.