Primary Objective:
To demonstrate the non-inferiority of H0E901-U300 to Lantus, in change of glycated hemoglobin A1c (HbA1c).
Secondary Objectives:
To demonstrate the superiority of H0E901-U300 in comparison with Lantus in:
* Percentage of participants with at least one severe and/or confirmed (by plasma glucose ≤70mg/dL [3.9mmol/L]) hypoglycemia event from 22:00 to 08:59 next morning
* Percentage of participants with at least one nocturnal (from 00:00-05:59) severe and/or confirmed (≤70mg/dL [3.9mmol/L]) hypoglycemia event
* Percentage of participants with at least one severe and/or confirmed (by plasma glucose ≤70mg/dL [3.9mmol/L]) hypoglycemia event occurring at any time of day
* HbA1c change