Welcome to the forum.
If you meet the requirements for a tier 1 work visa (in terms of qualifications, salary, funds, etc) then it be reasonable simple for you to come to the UK and search for a job.
http://www.ukba.homeoffice.gov.uk/wo...tier1/general/
If you don't then it's a lot more difficult as you need to find a company willing and able to sponsor you for a work permit for the job that they want to offer you. I don't think you'll find many (maybe none) companies willing to do this directly if you are not in the UK, so you need to find an agency in Japan or the Philippines that could help you. Don't though expect it to be easy as the jb market isn't great in the UK at the moment, especially for non-Europeans. I don't think many people on this forum will be able to help you as very few are here in the UK on work visas.
