Hardware Secrets posted a guide on how to Identify Japanese Electrolytic Capacitors
Not all electrolytic capacitors are manufactured equally. Japanese and solid caps have better quality, protecting your equipment from the infamous capacitor leakage problem and also increasing the life-span of your equipment, especially if it works at high temperatures, like it is the case with power supplies. In this short tutorial we will teach you how to identify Japanese capacitors and why they have a better quality.How to Identify Japanese Electrolytic Capacitors