Yaiba by Gosho Aoyama is a light-hearted manga about an adventuring samurai.
Reading manga can be a fun way to improve vocabulary, grammar, and even conversational Japanese.
All kanji have furigana (small hiragana to the side) which means everyone with hiragana knowledge can get something out of this manga. Still, some concepts and vocabulary may be advanced. Upper beginners can attempt to plow through it with the help of a dictionary.
NOTE: While this is a used manga, every effort has been made to select issues with only the best condition. Still, this may not be for those wanting pristine. It is excellent for studying with and enjoying.
Example inside pages may not be from this exact volume, but it is representative of the level and style of Japanese.