I started learning Japanese and I might plan to buy a textbook. Do you guys have any recommendations? I saw that alot of people use "Genki" Japanese textbook.
It's a good idea to buy textbooks but don't rely on it because if you follow EVERYTHING there people in japan will think you are a robot
So it's ok to buy one but use other sources (like renshuu ) or watch grammar or vocab videos for more explanation
(If you decide to buy genki (genki is good )don't follow the way they use to remember verbs,they do it by making you remember the verbs CONJUGATION instead of the verbs DICTIONARY FORM so it's better you learn the dictionary form first :D)
If you want a more academic approach, you could try the Genki textbooks (which a lot of universities use). There are premade lists at Renshuu that will allow you to easily follow Genki text books.
Those textbooks will get you through the beginner levels (JLPT N5 + N4).
I don't use any particular one, and I wouldn't know what fits you. They usually teach the same thing, YMMV on the approach. Genki and Minna no Nihongo are pretty academic. Tobira, AFAIK, is not for beginners.
Then there are free downloadable ones that get you from the beginner to the intermediate stage, like from Irodori or Marugoto. Plenty to find with a Google search.
For the organic approach, which kind of falls out of the textbook thing, but has the material, I would watch youtube channels like 日本語の森 if they cover what I'm studying. For me, if I were to do the textbook thing, I'd save my money and use the downloadable books as mentioned. I already have a bunch like them.
I do personally use Genki and got a used copy through either ebay or a secondhand book site.
it does really help to have a structured basis even if you shouldn't solely use a textbook either. Renshuu's lessons are great too. I think one benefit of Genki is that its so popular that when looking for other free resources for beginners it'll also be based around Genki which puts you on the same page as others. Theres even genki resources ON Renshuu!
id say it depends on whether you do better with structured lessons with clear progress and outlined exercises or if it would bore/demotivate you
I’ve been using the Genki textbooks along with Renshuu, and I’ve found that it really helps to get two or more explanations on things like grammar. Renshuu is nice because you can pair your study schedules with your textbooks, so if you’ve got a little eclairs money, I would definitely recommend the Genki books
) or watch grammar or vocab videos for more explanation 
