What IT services does KGA provide?

KGA provides comprehensive IT support services including software installation and setup, SaaS system maintenance, application configuration, technical support, digital consulting (including website development), security services, and data management & backup solutions.

What areas do you cover?

Based in Kosai, Shizuoka, we provide remote support nationwide across Japan. On-site support is available primarily in the Tokai region.

Can I consult before signing a contract?

Yes, initial consultation and estimates are completely free. We will listen to your IT challenges and propose the optimal solution.

Is emergency support available?

Yes, the Business plan (monthly) includes 24-hour emergency support. The Annual Basic and Annual Premium plans provide priority response during business hours.

Can you set up international TV apps?

Yes, we support the installation and configuration of international TV applications and media players. We help set up environments for legal access to international content.

Do you offer multilingual support?

We support 9 languages: Japanese, English, Portuguese, Korean, Chinese, Malay, Filipino, Vietnamese, and Spanish.

Are there any setup or hidden fees?

No. All prices displayed are final and tax-included. There are no setup fees, hidden charges, or surprise invoices. What you see is exactly what you pay.

Can I change plans later?

Yes. You can upgrade, downgrade, or cancel at any time. Upgrades take effect immediately and we will prorate the difference. Downgrades take effect at the next renewal cycle.

Which payment methods do you accept?

We accept all major credit cards (Visa, Mastercard, JCB, American Express) through Stripe and Komoju, as well as bank transfers and convenience store payments in Japan. Invoicing is available for Business IT Plan customers.

Do you offer refunds?

Yes. We offer a 14-day money-back guarantee on all annual plans — no questions asked. Monthly Business IT Plan subscriptions can be cancelled at any time with prorated refunds for unused service.

What is the difference between the annual plans and the Business IT Plan?

Annual plans cover app configuration and support for individuals and small teams. The Business IT Plan is a comprehensive monthly subscription for companies that require website development, system management, automation, security, and a dedicated account manager.

Do you provide support in English?

Yes. Our team provides full multilingual support in Japanese, English, Portuguese, Korean, Chinese, Malay, Filipino, Vietnamese, and Spanish — by email, chat, and scheduled video calls.

Back to articles

AI/AGI12 min

LangGraph 0.4 State Machines: Persistence, Branching, Human-in-Loop

Kenji WatanabeAI Engineer2026-04-2212 min

LangGraphState MachinePersistenceHuman-in-LoopBranching

This article is published in Japanese. Summary in English below:

LangGraph 0.4 State Machines: Persistence, Branching, Human-in-Loop—Designing LangGraph 0.4 state machines: persistence with Postgres/Redis Checkpointer, conditional branching, human-in-the-loop nodes, resumability and timeout patterns.

Read the full article in Japanese

Zhipu GLM-4: Coding, Function Calling and Long Context EvaluationPrevious article Distributed Inference 2026: Prefill/Decode Disaggregation in PracticeNext article

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