Na-adjective (keiyodoshi), Noun which may take the genitive case particle 'no'
various; a variety of; all sorts of; many (different)
Usually written using kana alone
いろいろな国へ行ったがやっぱり日本が一番いい。I've visited many countries, but I like Japan best of all. Adverb (fukushi), Adverb taking the 'to' particle
variously; in various ways; in many ways
Usually written using kana alone
Noun
various things; this and that
Usually written using kana aloneas ...のいろいろ
Also written 色色【いろいろ】