Takoboto is a free offline Japanese-English, English-Japanese dictionary. The translation is also provided with full sentences and example sentences to show the meaning and usage of the word.

It is not just a dictionary, but also a learning tool for Japanese. It also includes an in-app example and conjugation tool for each of the verbs in the words. There's also an option to import the words to AnkiDroid for a more immersive language learning experience.

This tool is useful for learning the Japanese language anytime you desire.