I am a native Japanese with engineering background, and although I am not a marketing specialist, I can try to set appointments with your target companies. I live in Tokyo, so we can meet for an hour or two in cafe, then you can let me know the name of companies (perhaps up to 5 with this budget), then I will either call or e-mail them. I think it will be important to know the reason why you meet them, and why they should meet you to make the appoints, so we should go over that before reaching them.
I will try my best to get the appointment, and if they ever decline, I will get the reasons why they don't want to meet you.
This is just my proposal, and we can be flexible within equivalent workload stated above.
Looking forard to hearing from you soon.