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How KDDI built Buffmee, a faster, reliable consumer RAG app
KDDI developed Buffmee, a consumer RAG application that allows users to search and summarize information from over 100 diverse sources.
Why it matters
This demonstrates how developers can reduce AI response delays and hallucinations, ensuring users receive reliable information quickly from complex media like books and magazines.
The big picture
While prior coverage mentions the Agent Development Kit (ADK) in the context of security harnesses and SDKs, this article shows its use in a consumer-facing application.
The details
- Used a two-dimensional grid for content sampling to reduce evaluation workload by 75%. - Split system prompts exceeding 800 lines into modular ADK Skills to reduce latency. - Replaced 1–5 ratings with a binary pass/fail system for critical metrics. - Product owners manually calibrated automated scores to define what was acceptable for shipment.
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Key connections
KDDI... developed Buffmee, their consumer Retrieval-Augmented Generation (RAG) app.
KDDI, a major telecommunications carrier in Japan
Shunya Onoda works at KDDI
Shunya Onoda, AI Product Department, KDDI.
Google's careful, hands-on guidance made that a reality — we're sincerely grateful for their support.
Buffmee is built with Retrieval-Augmented Generation
Buffmee, their consumer Retrieval-Augmented Generation (RAG) app.
Buffmee is built with Generative AI
When building consumer-facing generative AI applications... KDDI... developed Buffmee
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KDDI uses Gemini Enterprise Agent Platform
the development team designed a systematic AI evaluation process using Gemini Enterprise Agent Platform Evaluation Service.
KDDI uses LLM-as-a-Judge
By implementing automated evaluation frameworks like LLM-as-a-Judge
KDDI uses BigQuery Agent Analytics
the team implemented BigQuery Agent Analytics
KDDI uses Agent Development Kit
the team implemented... the Agent Development Kit (ADK) log analysis agent.
the team implemented... the Agent Development Kit (ADK) log analysis agent.
Buffmee is related to Personalized Learning
Buffmee helps users explore personalized learning and hobby interests.
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