While Japan has an excellent network of traditional road, rail, air, and sea travel, the country also boasts the exceptionally fast and safe Shinkansen system of bullet trains.
Complex
A complex sentence combines a dependent clause with an independent clause.
What is a example of complex sentence?
A complex sentence is one that has both an independent clause and a dependent clause that starts with a subordinate conjunction, such as before, although, while, etc.
Together, the major clause and the subordinate clause offer a thorough and comprehensive idea that contributes to the writing's depth.
According to the question, the given sentence serves as an example of a complex sentence because it includes both an independent or principal clause—"the country also boasts the exceptionally fast and safe Shinkansen system of bullet trains"—and a subordinate or dependent clause, "While Japan has an excellent network of traditional road, rail, air, and sea travel."
Consequently, it might be justifiably referred to as a "complicated sentence."