Building AI-era businesses together,
from vision to implementation.
NEXASPARK is a value-creation partner that takes you from AI-native business design through development and operations, all in one place.
Ask our AI Concierge anything on your mind
Accelerating transformation
as specialists in
generative AI adoption.
We are a team of professionals who unlock the full potential of generative AI, working alongside you from strategy through implementation and operations. Through the power of technology, we create new value for your business.
What We Solve
Cost Independence
Cut SaaS costs by bringing services in-house. We help you break free from external dependencies and build systems optimized for your business.
Product Enhancement
Build AI into your existing services. With LLM integration, RAG, and AI agent development, we sharpen your product's competitive edge.
Internal AI Adoption
Make scattered knowledge usable with AI. From organizing internal data to driving adoption, we lay the foundation for AI across your organization.
Three services to drive your business growth
From strategy to implementation to organization-wide adoption, one team supports every phase of your generative AI journey.
Business Domains
From applications and screening to e-commerce and accounting, we support your operations with AI-native DX, from concept through implementation and operations.
Applications & Screening
From websites and landing pages that attract customers to customer management and automated screening. We digitize the entire flow from application intake to review and approval with generative AI, improving both efficiency and customer experience.
- Website Development
- Landing Pages
- Customer Management Systems
- Automated Screening Systems
E-Commerce
Centered on building your own e-commerce platform, we cover everything from automated order and inventory management to AI-powered product recommendations and content. We design both the mechanisms that grow sales and operations that don't depend on specific people.
- Custom E-Commerce Platforms
- Order & Inventory Automation
- AI Product Recommendations & Content
Accounting
From accounting system development to automated billing, payment tracking, and expense reimbursement. We integrate with your existing accounting software and workflows to streamline your entire finance operation.
- Accounting System Development
- Billing & Payment Automation
- Expense & Accounting Software Integration
Products
Our own products, built in the spirit of "Be a Practitioner." We plan, develop, and operate apps that stay close to local communities and everyday life.
Projects
Joining at the concept stage, implementing AI features, and improving continuously with agile teams. Here are some of the projects we have worked on alongside our clients.
Blog
Insights from the front lines of generative AI, development, and business building.
Let's talk about
your challenges
Whether it's leveraging generative AI or driving digital transformation (DX), we'll propose the best approach for your specific needs.
- Response
- We typically reply within 2 business days
- Office
- Tsuzuki-ku, Yokohama, Kanagawa (online meetings available)
- AI Chat
- Ask the AI Concierge





