Hello, we are Julian and Karolina Tenzler from Germany. Julian has a PhD in mathematics and loves teaching and exploring things in depth. Karolina has a double diploma in mathematics and business administration, and has worked in the energy industry for several years.

By all accounts, we had everything we could have asked for, and the prospect of promising careers in our respective fields. But in 2017, our lives took a dramatic turn when Jesus clearly called us to quit our jobs and go to Japan as missionaries.That’s how it came about that we worked as full-time missionaries in Japan from 2020 to 2025. There, we helped Japanese Christians—especially in Hokkaido, Japan’s northernmost island—to grow as disciples of Jesus and in trusting God, in order to reach their own communities and personal networks with the Good News. In addition, we experienced how the Holy Spirit led us in the most unexpected ways to those who were lonely, wounded, and searching for truth.

Now we are back in Germany for the time being, in part to write a book about what God has shown us throughout our ministry. Yet we are convinced that sooner or later we will return to Japan. Our passion is personal discipleship and to encourage, train and equip people—whether in Japan or in Germany—to know God and learn to trust Him.