The best way to start learning Japanese is to begin with the basics: learning Hiragana and Katakana, the two primary syllabaries. Once you have a good grasp of these, you can move on to basic grammar, vocabulary, and simple sentence structures. Consistent practice and exposure to the language through listening, speaking, reading, and writing are essential.

The time it takes to become fluent in Japanese varies greatly depending on your learning methods, consistency, and immersion. On average, it can take several years of dedicated study and practice to achieve fluency. Engaging in daily practice and immersing yourself in the language as much as possible can significantly speed up the process.

While you can learn to speak and understand Japanese without knowing Kanji, it is highly recommended to learn it if you want to be proficient in reading and writing. Kanji is an integral part of the Japanese writing system and is used extensively in daily life.

Effective techniques for memorizing vocabulary include using flashcards (physical or apps like Anki), incorporating new words into sentences, practicing with spaced repetition systems (SRS), and engaging in regular reading and listening practice to see and hear words in context.

Staying motivated can be challenging, but setting clear goals, tracking your progress, and rewarding yourself for milestones can help. Joining a community of learners, participating in language exchange, and immersing yourself in Japanese culture through media, food, and travel can also keep your motivation high.