Blog
Selected technical writing, talks, and professional updates in English.
- Activity· 5 min read
Lightning Talk at JAWS-UG Yamanashi: OpenTelemetry Metrics in CloudWatch, Queried with PromQL
A JAWS-UG Yamanashi talk on what stays and what changes when OpenTelemetry metrics move from Prometheus to CloudWatch's native OTLP endpoint and PromQL.
OpenTelemetryAmazon CloudWatchJAWS-UG - Article· 14 min read
Distributed Tracing in Rust with OpenTelemetry: From ECS Fargate to AWS X-Ray
Sending spans from a Rust axum app through an ADOT Collector sidecar on ECS Fargate to AWS X-Ray, then reading them back with the AWS CLI and a local Grafana.
OpenTelemetryRustAWS X-Ray - Activity· 17 min read
KubeCon + CloudNativeCon Japan 2026: A Recap from the Floor
What I took away from two days in Yokohama: cloud native infrastructure for AI, proxyless gRPC, observability, and AI agent evaluation.
KubernetesOpenTelemetryAI - Activity· 2 min read
Lightning Talk at NW-JAWS: An Amazon ECS Service Connect E2E Failure
An NW-JAWS talk on why a standalone ECS task could neither resolve nor receive traffic through Service Connect during an end-to-end test.
Service ConnectAmazon ECSJAWS-UG - Activity· 2 min read
Lightning Talk at JAWS-UG Ibaraki: Becoming an AWS Jr. Champion
A JAWS-UG Ibaraki lightning talk on the work that led to AWS Jr. Champions recognition and the engineering goals that followed it.
AWS Jr. ChampionsJAWS-UGAWS - Recognition· 2 min read
Selected as One of 114 Japan AWS Jr. Champions for 2026
AWS selected 114 early-career engineers from APN companies for the 2026 Japan AWS Jr. Champions cohort, and I was one of them.
AWS Jr. ChampionsAWS - Activity· 2 min read
Lightning Talk at Meguro LT: The 'Why' Behind AI-Assisted Commits
A Meguro LT talk on linking AI coding sessions to Git commits so reviewers can inspect the reasoning behind a small diff.
GitCode ReviewAI - Article· 12 min read
Migrating AWS Resources to IaC with Terraformer
A practical guide to using Terraformer for converting existing AWS resources into Terraform-managed Infrastructure as Code, covering a four-step workflow and best practices for handling secrets and state files.
TerraformerTerraformAWS - Article· 10 min read
AWS ECS: When to Use Service Connect vs Service Discovery
A practical guide to choosing between Service Connect and Service Discovery for ECS microservices communication, with Terraform implementation examples.
Service ConnectService DiscoveryAmazon ECS - Activity· 9 min read
Hackathon Report: Building Trayce at Raycast Tokyo
From an ideathon and the Tokyo AI Hackathon to a community meetup, three events that took Trayce from an idea to a working Raycast extension.
RaycastAIHackathon - Activity· 2 min read
Lightning Talk at SRE Tech Talk: GitHub Actions and AWS OIDC
A cloud security lightning talk on how GitHub Actions obtains short-lived AWS credentials and why OIDC replaced stored access keys.
GitHub ActionsOpenID ConnectAWS - Activity· 2 min read
Lightning Talk at JAWS-UG: From Docker to Amazon ECS
A beginner-focused lightning talk on the CI/CD, IAM, and observability concerns that appear when a container moves from a local environment to Amazon ECS.
Amazon ECSContainersJAWS-UG - Activity· 2 min read
Lightning Talk at Qiita Bash: One Month with Cursor as a Team
A lightning talk at Qiita Bash on the benefits, limits, and gradual adoption of an AI code editor by a team working on client projects.
CursorTeam DevelopmentAI