The top seed overcame the world number 88 in 75 minutes, breaking three times in the match from seven opportunities on the Doi serve.
It was the first encounter between the two players, and the world number eight from the Czech Republic was not always comfortable on serve with just a 59 per cent record on her first delivery, but did just enough to win through.
The competition, staged at the Spodak Arena, is barely a two-hour drive from Fulnek, the hometown of the 2011 Wimbledon champion, and she is expected to shine despite the clay courts not always being to her liking.
Next up for Kvitova will be a second-round clash with Mandy Minella of Luxembourg, who defeated Serbia’s Vesna Dolonc in her first-round match.
The Czech is looking for her second WTA title of the season, having notched up a success in Dubai in February, and is preparing for her French Open campaign on clay.
Seeds did fall later in the day, however - with third seed Kalra Zakopalova ground down in three sets against Italian Maria Elena Camerin, and sixth seed Kaia Kanepi undone by Karolina Pliskova.
WTA Katowice results
Karolina Pliskova (Czech Republic) beat 6-Kaia Kanepi (Estonia) 7-5 6-3
Annika Beck (Germany) beat Lourdes Dominguez Lino (Spain) 5-7 6-3 6-2
Maria Elena Camerin (Italy) beat 3-Klara Zakopalova (Czech Republic) 7-5 3-6 6-3
Petra Martic (Croatia) beat Anna Karolina Schmiedlova (Slovakia) 6-4 6-2
2-Roberta Vinci (Italy) beat Andrea Hlavackova (Czech Republic) 6-2 2-0 (Hlavackova retired)
Alexandra Cadantu (Romania) beat 7-Sabine Lisicki (Germany) 7-5 6-2
1-Petra Kvitova (Czech Republic) beat Misaki Doi (Japan) 6-4 6-4