Of, pertaining to or at the level of a prefecture(adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "prefectural" in a sentence
"In 2003, at the age of twenty-eight, she became the youngest person ever elected to the Osaka prefectural assembly the equivalent of a state congress."
"Sumo takes place at the Osaka prefectural gymnasium, which is built by the people’s tax money, and the Governor’s award is also using the public tax money."
"This will violate both countries' laws on species conservation and ignore a referendum and local and prefectural elections in which all candidates have opposed the plan."