[1] He presided over the public-private development partnership URBS, which oversees the public transit system in Curitiba, from 1972 to 1975.

[1] He took this position during a time of change for the economic profile of Paraná, as the state began to shift towards attracting and fostering an automobile manufacturing industry (such as with carmakers Audi, Volkswagen and Renault).

During his time there, he introduced laws to offer incentives to cities to improve urban spaces in terms of reducing carbon emissions and promoting environmental friendliness, in order to combat global warming.

[1] During his time as mayor, in 2000, then-president Fernando Henrique Cardoso awarded Taniguchi the Commander class of the Order of Military Merit by decree.

[3] In 2010, Taniguchi was sentenced to 6 months in prison, being accused of embezzling money as mayor from an agreement between the government of Curitiba and the Inter-American Development Bank.