All modes of transportation experienced peak congestion Saturday, the first day of the four-day holiday in the second half of Japan's Golden Week, as the travel and return rush intensified, operators said.Reserved seats on shinkansen bullet trains were quickly filled, while many domestic flights were at full capacity. Train stations and airports were packed with travelers, with long traffic jams expected on expressways.Most seats on Nozomi bullet trains departing Tokyo on the Tokaido Shinkansen Line were already booked Saturday morning. Reservations for other shinkansen lines were also most…READ FULL ARTICLE