How to apply a working visa in japan from here in...

we would like to inform you that foreigners who want to work in Japan need to obtain a work visa from the Japanese embassy or consulate outside Japan to enter Japan in case of residence permit. Therefore, you should first look for job through a recruitment site or through a friend so that you can get on your visa, where the employer will apply it to the immigration authorities on your behalf as early as the date of commencement of employment. If you are still outside Japan as technically, you are not allowed to enter Japan to seek work.
required documents and application process will differ according to applicant's nationality and purpose of travel. For more details, please contact consular section of the Embassy. Foreign Residents in Qatar should have a Qatari Residence Permit on their passports. Applications of non-residents in Qatar are basically not accepted.
You can contact the Japanese Embassy in Qatar via the following link:
emb-japan