There are some teachers I don't like. Not that I hate them, but there's no shared interests and no chemistry, so to speak. So I don't talk to them very often. But I know I should try and make an effort to just stop by for a quick English chat. And here's some nice anecdotal evidence as to why.
If you've been an ALT in Japan a few years or so and teaching in elementary schools, you've probably used the Hi, friends! textbooks. Well, just like Eigo Noto gave way to Hi, friends!, Hi, friends! is set to be displaced by a new set of textbooks called We Can!
The Hi Friends! books aren't great.
The language introduced isn't always useful, the methods to introduce the language aren't always effective, and calling some of the activities inside "fun" is an insult to the word.
Unfortunately, if you teach at Elementary Schools as an ALT in Japan, you are going to have to use those books whether you like it or not.
If you are planning a visit to Japan, short or long term, and intend to drive, then yes you will need an international driving permit. Even if you don't plan to, if you just want to be able to drive should the chance arise, you will need it and the low cost versus the convenience means it's worth getting.
This is a response to the article entitled 10 reasons to become an ALT in Japan. While there are many people who come to Japan and work successfully as an ALT for a year or two, there are many complaints and even a few people who have more complaints than reasons to stay and have to leave before they initially planned to. Note: This article is quite negative but your own experience is what you make it.