The independent inquiry into child sexual abuse will open its Welsh office on Wednesday.
Professor Alexis Jay, chairwoman of the probe, will attend a launch event in Cardiff.
It will also mark the start in Wales of the inquiry's "truth project", through which victims and survivors of abuse can share their experiences.
Prof Jay said: "I am delighted be in Cardiff today to meet with representatives from across Wales to discuss the work of the Inquiry.
"In particular, we want to highlight how victims and survivors can share their experiences with us as part of the Truth Project."
Chris Tuck, from the inquiry's victims' and survivors' consultative panel, said: "We acknowledge the courage that it takes to share an experience of child sexual abuse but each experience shared will make an important contribution to the work of the Inquiry.
"Victims and survivors can share their experiences with the Inquiry in a safe and secure environment during a private session. Specialist support will be available to each person who engages with the Truth Project.
"They can be accompanied by a family member, friend or other support person of their choice."
Last week, Prof Jay, who is the inquiry's fourth chairwoman, unveiled her strategy to complete most of its work by 2020.
The inquiry has been mired in controversy since it was launched in 2014.