While on a trip to Arizona in November of that same year, Shiga was killed in an accident near Flagstaff when she was thrown from the vehicle due to the car rolling as it swerved to miss an animal.

After playing the role of Yumi and performing the theme song for the series, she officially made her debut as an idol singer under Warner Pioneer.

[6] During the promotion of her second single, she appeared as a guest on the radio program "Kenji and Yasuko's Omoshiro Land" (Nippon Cultural Broadcasting).

However, on November 23 of the same year (24th Japan time), when she went on a short trip after studying abroad, an animal jumped out in front of the car she was riding in with four friends on a freeway near Flagstaff, Arizona.

In order to avoid it, he suddenly turned the steering wheel while driving at high speed, causing a traffic accident in which the car overturned.