BQ24092: Does BQ24092 conform to the JEITA specification? Does TI have a specification for JEITA? What does JEITA design need to be aware of?

Yes the BQ24092 does conform to Jeita. If you read page 22 of the datasheet you will see the following excerpt:

"The bq2409x family contains an NTC monitoring function. The TS function for bq24090, bq24091 and bq24095 follow the classic temperature range and disable charge when the battery temperature outside of the 0°C and 45°C operating temperature window. The TS function for bq24092 and bq24093 are designed to follow the new JEITA temperature standard for Li-Ion and Li-Pol batteries. There are now four thresholds, 60°C, 45°C, 10°C, and 0°C. Normal operation occurs between 10°C and 45°C. If between 0°C and 10°C the charge current level is cut in half and if between 45°C and 60°C the regulation voltage is reduced to 4.1Vmax"