Breakdown of tashika ni kore wa kare no saifu desu.
this (one) pronoun
possessive case particle
確か にtashika ni
surely; certainly; indeed
Where きっと expresses a strong belief or confidence that something will happen or is the case, 確か に often additionally implies that the speaker has evidence or reasoning to support the certainty, or has personally verified the fact.
Elon.io is an online learning platform
We have hundreds of Japanese lessons and thousands of exercises.