en.wikipedia.org/wiki/My_Neighbors_the_Yamadas

This sentence understates the film's digital workflow. Studio Ghibli's official history says My Neighbors the Yamadas was the studio's first film produced entirely in full digital (「全編フルデジタルで制作された最初のジブリ作品」) and adds that after Princess Mononoke the studio moved to full digitization of the finishing and photography departments (「仕上・撮影部門の全面的デジタル化」).

The production diary also describes more than digital coloring: in April 1998 the studio wrote that the film would be painted entirely digitally and that the backgrounds would be photographed with a digital camera. A November 1998 production-diary entry further says the finishing, photography, and CG departments had become digitally transformed.

So the article's claim that only the coloring stage was fully computerized is contradicted by Studio Ghibli's own documentation, which describes a broader digital pipeline including finishing and photography, and characterizes the movie as the studio's first fully digital production.