Christ Bible Institute


The CBI team is a diverse group working together to bless Nagoya, Japan, and beyond. Get to know the team more below! If you’re interested in joining or learning more about the CBI team, please contact us at

Michael and Pearl Oh

Michael and Pearl Oh have served as Mission to the World missionaries since arriving in Nagoya in January 2004, which also marked the official launch of CBI. They have five children, three of whom were born in Japan. After launching and leading CBI for its first 9+ years, Michael made a transition in March 2013 to become the Executive Director / CEO of the Lausanne Movement, which was founded by Dr. Billy Graham and has helped introduce to the global church some of today’s key mission strategies. Michael & Pearl have been involved with the All Nations Fellowship church plant since its beginning in June 2008, and Michael continues to serve as Board Chair of CBI and Chancellor of Christ Bible Seminary.

Brett and Taylor Rayl

Brett and Taylor Rayl began serving with CBI in 2012 as short-term missionaries through Mission to the World. In March 2013, Brett accepted the call to leadership for CBI and the family committed to long-term service in Japan. In December 2013, God gifted them with the birth of their first son, Paton. Brett serves as the Director and Team Leader of Christ Bible Institute, overseeing missionaries and national staff, projects and funds, and casting vision and directive for the ministry as a whole. He graduated with a Master’s of Divinity from Reformed Theological Seminary in 2012. Taylor serves the ministry and missionaries in many ways, and having Paton in tow opens up wonderful avenues for relational outreach and discipleship. (Brett & Taylor Blog)

Craig and Yumiko Chapin

Craig and Yumiko Chapin met near Tokyo in 1988 and were married there in 1999. Yumiko is from the city of Tokorozawa, and Craig is from the Washington, D.C., area. They have served on the CBI team since 2007, at first as missionaries with Asian Access and now under the auspices of Mission to the World. Craig serves on the Executive Leadership Team for CBI and teaches New Testament and serves as the interim president of Christ Bible Seminary. Yumiko puts her love of music and baking to use for various ministries in and around Nagoya. You can learn more about the Chapins—and Craig’s countless cultural blunders—on their Web site.

Takanori Oba

Takanori Oba is from Tokyo, Japan. He was a member of the first graduating class of Christ Bible Seminary, graduating in 2009. Takanori then went on to received his Masters degree in Christian Philosophy from Nanzan University in 2012 and is a Ph.D candidate at Nanzan University, researching the Church Fathers. He serves as Pastor at Kita Yokkaichi Christ Church (Presbyterian Church in Japan) in Mie prefecture. He is the Dean of Students and a full-time instructor at Christ Bible Seminary, and is also a member of the Japan Lausanne Committee. It is his prayer that the Lord would use him here in Japan through the avenues of caring for the Japanese church and training up seminary students with solid theology.

Yoko Katsuyama

Yoko Katsuyama is from Ishikawa, Japan. She serves as the Accountant for CBI and as a Teaching Assistant at Christ Bible Seminary. Yoko studied Microbiology in college, and went on to work in Research & Development for a Cosmetic and Food supplier. It was while she was working in industry that she became a Christian. for In March, 2015, Yoko completed the M.Div course at Christ Bible Seminary. The Lord has given Yoko a heart to help struggling Christians grow in their faith.

Paul and Yu Kang

Paul and Yu Kang are missionaries with JEMS (Japanese Evangelical Missionary Society) and have been serving in Japan since 2008 as a family. God has blessed them with two children. Isaac Soon Kang and Sara Faith Kang. Paul is serving as Chaplain and translator at Christ Bible Seminary and serves as Coordinator for Next Generation Ministries at All Nations Fellowship. Yu was born and raised in Nagoya and became a Christian when she was in high school. She has a heart for children’s ministry and loves to share the gospel with those who are neglected and struggling in society.

Damon and Young-Mi Cha

Damon and Young-Mi Cha are from Irvine, CA, and have two daughters, Aliya and Mikayla. They have been serving in Japan since February 2015 as missionaries sent by Redeemer Presbyterian Church in Los Angeles, CA. Damon is a PhD Candidate and teaches Old Testament for Christ Bible Seminary. Damon and Young-Mi have a heart to help build strong, gospel-centered churches in Japan and to nurture and equip the upcoming generations for Christ by training church leaders and seminary students, encouraging Japanese Christians, and sharing the gospel through relationship building and ministry opportunities. Learn more about the Cha family on their website,

Matt and Caroline Newkirk

Matt and Caroline Newkirk made their first short-term trip to CBI in the summer of 2008, and since that time have been preparing to serve as long-term missionaries with Mission to the World. Matt holds a Ph.D. in Old Testament from Wheaton College, has taught several biblical studies courses at Christ Bible Seminary, has served on staff at multiple churches, and has taught at seminaries in both the U.S. and Australia. Caroline earned an M.A. in Intercultural Studies from Wheaton College, and together with Matt and their three children – Lydia, Silas, and Ethan – loves to encourage and support seminary students and serve the local church. The Newkirks are excited to be working with Christ Bible Seminary on a full-time basis where Matt serves as professor of Old Testament.

Ayako Hayashi

Ayako Hayashi is from Okayama, Japan. She came to Nagoya in 2006 for university, and, through a friendship with a missionary, she decided to follow Jesus when she was a freshman. She began working at CBI in June 2012, and currently serves as Admissions Director for CBS, as well as CBI Building Management Lead. Ayako is married to Kenji Hayashi, who graduated from Christ Bible Seminary in 2011. Kenji has served as the pastor of Nagoya Christian Cell Church since April 2011.

Kenji Hayashi

Bio coming soon.


Masakuni Hotta

Masakuni Hotta is a ministry intern with CBI as a missionary through Mission to the World. He is a Japanese American, born and raised in Michigan in a Buddhist family. Masakuni became a Christian in middle school through the youth group at a local church. Soon after that, God placed a burden on Masakuni’s heart for the great need for the gospel among Japanese people, beginning with his family. God called Masakuni to ministry in Japan after graduating from the University of Michigan in May of 2015, where he studied Biomedical Engineering and Asian Studies. He hopes to serve with CBI for the next year as God reveals to him more about his role in the Church in Japan.

William and Mary Jo Ruck

William and Mary Jo met while they were both attending Central Christian College of the Bible in Moberly, Missouri. Soon after graduating they married in 2007. In February of 2009 William and Mary Jo moved to Sendai, Japan where they both worked at Meysen Academy. Late in 2011 they moved to Aichi prefecture where they attended language school. After language school their first daughter, Elnora, was born and William began working with Mustard Seed Christian Church in Nagoya. In 2014 their second daughter, Judy, was born. William will now be joining the staff of CBI to be a part of the Heart & Soul Cafe ministry team. As a member of the Heart & Soul team, Williams love and knowledge of coffee will come together with his heart for outreach ministry. William and Mary Jo are excited about this new chapter in their ministry and their continued service in the city of Nagoya.

Young Lee

Young Lee is from Chicago, IL. In 2002, the Lord led Young to Seoul, South Korea where she worked as an English teacher. Later she was called into full-time ministry. She attended Torch Trinity Graduate University where she received her MDiv, and she served on the staff at SaRang Community Church in Seoul. She has been serving at Christ Bible Institute since March 2014 with Reliant. Young has a heart for serving others and for discipleship. She is serving as Events Coordinator with Heart & Soul Ministry, which is the outreach arm of CBI. Young knows the importance of building relationships, so she is also working on learning Japanese and understanding Japanese culture.

Sarah Chang

Sarah Chang is Korean-American from New Jersey and has been serving in Japan since February 2014 as a missionary with Pioneers. She has a BA in English Literature from Cornell University and an MA in World Missions from Gordon-Conwell Theological Seminary. Her home church is Grace Community Chapel (NJ). Before coming to Japan, Sarah worked as an editor for several years, then as the middle school pastor at the Korean Emmanuel Presbyterian Church (CA). Most recently, Sarah served as Coordinating Editor on the communications team for the Lausanne Movement.


Gary and Lois Watanabe

Gary and Lois Watanabe have worked overseas in ministry in various capacities and places for almost 30 years. They moved to Tokyo in May 2015 because it seemed there was both a growing spiritual hunger and interest in gospel-centered churches to meet that need. Those same reasons brought the Watanabes to Nagoya in September 2016 to partner with CBI in starting a church planting center. Their prayer is that the center will help provide a greater vision for church planting and help train leaders and pastors who are involved in church planting and ministries throughout Japan. The Watanabes have three adult children who are married and living in the US, and four grandchildren with whom they love to FaceTime!

Akiko Bowker

Akiko Bowker is from Gifu, Japan. She grew up in a strict Buddhist Japanese family. She met Christ through her husband, Dan. She worked at a junior high school after she got married, and still has a heart for ministering to children. Akiko is an administrator for CBI and Christ Bible Seminary. Her husband Dan is from England and currently a student at Christ Bible Seminary. Akiko and Dan have a long-awaited son named Tomoki Samuel, who was born in 2015.

Jeremy and Gina Sink

When Jeremy and Gina were married in 1995, cross-cultural missions was nowhere in their plans. After graduating from Reformed Theological Seminary, Jeremy served for ten years as a church planter and pastor in the Piedmont Triad region of North Carolina. During that time, God opened the Sinks’ eyes to the need for experienced pastors to help plant new churches in Japan.

The Sinks arrived in Nagoya in 2012 with their three sons: Joshua, Josiah, and Garrett. After two years in language study, they joined the CBI team in April 2015. They now serve in the area of member care while also leading a bilingual church plant called All Nations Fellowship (ANF) where young leaders gain practical ministry experience through church-planting apprenticeships. The work is hard, but the Sinks are very encouraged by how the Holy Spirit is working in Nagoya through CBI and ANF.

Rebecca Dennison

Bio coming soon.