Hello Keita Nagashima,
Thanks for your patience.
Finally, just for reference the temperature grades for AEC-Q100 qualification are as follow:
Grade 0: -40°C to +150°C ambient operating temperature range
Grade 1: -40°C to +125°C ambient operating temperature range
Grade 2: -40°C to +105°C ambient operating temperature range
Grade 3: -40°C to +85°C ambient operating temperature range
Grade 4: 0°C to +70°C ambient operating temperature range