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Sincere.inc
株式会社シンシア
A brand development-oriented OEM/ODM partner that supports everything from product planning to brand expression for lifestyle goods, gadgets, and accessories. Unlike production-focused OEMs that lead with factory equipment and certifications, Sincere.inc differentiates itself through in-house creative capabilities — product concept design, product development, photography, graphic design, and web — all under one roof. With a portfolio spanning smartphone accessories, tech gadgets, lighting, leather goods, jewelry, and interior décor, Sincere.inc enables brands to launch products in small lots at low cost, even without prior manufacturing expertise. This makes them particularly well-suited for D2C brands launching their first line or teams that need professional guidance from the idea stage.
Order overview
- Minimum order
- Needs confirmation
- Sample
- Custom quote
- Lead time
- Needs confirmation
Terms vary by specifications and quantity. Confirm current details when inquiring.
Visit official siteItems and categories
Order fit
Supported products
- Smartphone accessories, tech gadgets, mobile power banks, mice, and digital peripherals
- Watches, keychains, bags, leather goods, jewelry, and bracelets
- Lighting fixtures, interior décor, and lifestyle goods
Best for
- D2C and e-commerce brands looking for a one-stop partner covering product concept, branding, photography, and promotional materials
- Teams wanting to launch lifestyle goods, gadgets, tech accessories, or décor under their own brand in small quantities without prior manufacturing expertise
Checks before inquiry
- Factory ownership, subcontractor locations, MOQ, sample availability, lead times, inspection setup, and payment terms are not publicly confirmed and should be verified during inquiry.
- No confirmed track record for mass-production apparel, cosmetics, food, or certification-intensive products — these categories may not be a good fit.
Lot guidance
Small-lot production is explicitly supported, enabling low-risk product launches at reduced cost. Specific MOQ should be confirmed on inquiry.
Sample terms
Full-process support from planning through delivery is offered. Sample availability, pricing, and lead time should be confirmed on inquiry.
Service scope
See which stages are available from planning through delivery.
Planning and design proposal
Supported
Sample development and testing
Needs confirmation
Material and packaging sourcing
Needs confirmation
Mass production and processing
Needs confirmation
Quality, certification, and labeling
Needs confirmation
Packing, kitting, and logistics
Needs confirmation
Quality and certifications
Quality control setup, inspection methods, and third-party certifications are not publicly confirmed and should be verified on inquiry.
Certifications
Not confirmed in public information
Sustainability
Not confirmed in public information
Published information may include supplier-provided or operator-verified details. Confirm specifics during your inquiry.
Track record
Past clients
Confidential
Production countries
Japan
Equipment and materials
Manufacturing equipment and resources
Supported materials
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