1.
avocado
A creamy green fruit commonly eaten in salads, sushi, and various dishes. Very popular in Japanese cuisine, especially in sushi rolls and as a topping.
Writing
The correct Japanese is アボカド (from Spanish/English "avocado"). A common error is アボガド (with ガ instead of カ), which even many native speakers use.
Usage
Avocado is extremely popular in Japan, appearing in sushi (especially 海鮮サラダ rolls), salads, and as a side dish with soy sauce and wasabi. It became widely available in Japan starting in the 1980s.