Can I attend a japanese high school?

Hello I have a question as a foreigner from poland could I attend a japanese high school or is it impossible?

Short answer: no

Long answer: look up many previous threads with the same question on this forum. Eg
https://www.japan-guide.com/forum/quereadisplay.html?0+178245

A bit longer answer: finish high school at home then get a student visa to attend language school in Japan

There is a lot of nuance in this question. Here are some questions to ask?

Do you speak and write Japanese to an age appropriate level?

If the answer is no - then I'm not sure what purpose going would achieve. It takes most of primary school for students to leave the 3 writing systems needed to be successful in an academic sense.

Do you have a specific reason to live in Japan - such as a parent working in Japan?

If you are on a dependent visa - then it's possible to attend a local high school. However - I'm not 100% sure as high school is not compulsory education such as primary and middle school. Note that there is no "I want to live in Japan" visa but there is an education visa.

This is not my area of expertise - but I am aware of some English speaking International schools in Japan which actively recruit overseas students. UWC Kariuzawa is one example - but I can't vouch for their quality.

If you are of high school age and can't ask these questions IN JAPANESE on a Japanese forum, then you probably don't and won't have the skills needed to be successful.

My expertise is in teaching EAL students (I'm an international school teacher) a western education IN ENGLISH. In general - it often takes 2-4 years for students to get up to scratch with academic English. My guess is it would take longer with Japanese/Chinese due to the complexity of the writing system. Polish/English is phonetic, while the main Japanese alphabet uses a specific character to identify the work. To the best of my knowledge, there are tricks in learning to write characters easier but not so much in remembering the 4000+ words that most adults know in Japan.

But as mentioned above - I don't know how you would get a visa that will allow you to live in Japan as a student, unless money was no object and you did not worry about the main mode of spoken language (English speaking dorm schools)

Of course it's not impossible.

Of course it may not be 100% impossible, but is still quite unrealistic except for the options below.

As has been discussed in many previous threads, there is almost no way for foreign children to legally attend high school in Japan, other than by participating in an exchange program that your school or country is involved in. Please check as soon as possible whether your school offers such an option to students. Most programs have age regulations and selective sessions, which means they don't cover all willing students. You may need to hurry up to take actions.

As mfedley mentioned, you could go to a boarding international school, but that would cost 6.2 million yen (about 160,000 Polish zlotys) PER YEAR in tuition and boarding fees BESIDES extra living expenses, and you would be living in a mountainous area far from the city. We're not sure that is the ideal environment you exactly want. (Many young people get bored of living in a remote area soon and often complain about it.)

There are certainly many foreign children who live and go to school in Japan, but the majority of them, or perhaps all of them, have parents who hold work visas, permanent residency, or other visas that also provide residency status for dependents and live together with them. (Ignoring extremely kind sugar-coated treatments to children of the illegals.) Legally, no foreigner on a tourist visa is able to come to Japan and drop their child off in a random local high school.