How Japanese SME decisions actually get made
Most Japanese OEM suppliers are SMEs (10–200 employees). Decision-making in these environments has a few specific characteristics that shape negotiation. Decisions are typically not made by the person you're emailing. Your overseas-account contact will collect your inquiry, draft a response internally, get internal sign-off from production manager + sales director + sometimes the founder, then reply. This is why responses can take 3–7 business days that look like indifference but are actually internal alignment.
Avoiding mistakes is valued more than maximising upside. Japanese supplier culture is risk-averse — a decision that maintains the status quo is preferred to one that creates uncertainty even with higher expected return. This means: pushing hard for fast / aggressive terms often slows you down, not speeds you up. Build comfort first; press for terms second.