Japan is shown to often be unnerved by Italy's "shameless" and unusual behavior, even as going as far as to order him to "take responsibility" and marry him after having been hugged and kissed. Italy's erratic driving had also inspired him to invent safer cars. The two have been shown to have a mutual respect of each others' history and artwork, and seem to be friends.
 
Japan is shown to often be unnerved by Italy's "shameless" and unusual behavior, even as going as far as to order him to "take responsibility" and marry him after having been hugged and kissed. Italy's erratic driving had also inspired him to invent safer cars. The two have been shown to have a mutual respect of each others' history and artwork, and seem to be friends.