I checked the status and understand your intension now.
Okubo san's tool:
They are apparently "No commercial value".
Bulb and receptacle:
They are samples for technical verification, and therefore "No commercial value".
They need invoice to send to Nippon Sec, but express "No commercial value"
on the invoice.
Please input small unit prices, so that the total amount must be around 10US$.
You can send them by EMS.
I think you may need to make 2 cartons, separating heavy tools and fragile materials.