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Tech & Tools

A Control Engineer’s Attempt at DIY Active Noise Cancellation with ESP32

I have always enjoyed modifying cars — not only for appearance and performance, but also for comfort. Like many car enthusiasts, I experimented with various passive noise reduction methods: These methods certainly help, but they also come with trade-offs. Adding damping materials increases weight, installation effort, and cost. Eventually, the improvements start to diminish. As […]

Life in Japan

Is PTA Really “Voluntary” in Japan?

In many countries, joining the PTA (Parent-Teacher Association) is entirely optional. Parents can decide how much they want to be involved—or not involved at all. In Japan, however, things work a little differently. While participation is technically voluntary, in reality, most parents end up being involved in some way. What Is PTA? PTA stands for

Life in Japan

Convenience Stores in Japan: Great — If You Use Them Right

Japanese convenience stores often impress first-time visitors. They are clean, open 24 hours, well-stocked, and surprisingly functional.Compared to typical convenience stores in the United States, many people are surprised by how much more they offer. However, while convenience stores in Japan are undeniably useful, they are not always the best option for everyday living—especially from

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