Coordinating conjunctions in Japanese grammar play an important role in connecting words, phrases, and clauses to make complex sentences. They help speakers to express complex ideas and relationships between concepts or actions, and contribute to the overall flow of the text. Some common coordinating conjunctions in Japanese include ‘そして’ (soshite), ‘しかし’ (shikashi), ‘そして’ (sorede), and ‘でも’ (demo). Learning and practicing these conjunctions will significantly improve your Japanese sentence building skills.