The forecast for VoIP call durations in Japan from 2024 to 2028 shows a steady decline, beginning at 113 minutes in 2024 and decreasing to 94 minutes by 2028. This indicates an average yearly decrease, or CAGR, over the five-year period. The trend suggests a consistent decrease in usage, with specific year-on-year reductions averaging around 4-5% annually.

Key future trends to watch for include:

The potential impact of new communication technologies and platforms which could further decrease VoIP usage.
Shifts in consumer behavior as alternatives such as 5G and other digital communication tools become more prevalent.
Regulatory changes impacting the telecommunication sector in Japan.