as many people as possible
Used when encouraging or hoping for the maximum number of participants, often in invitations, volunteer calls, or event promotions.
一人でも多くの方に参加していただきたいです。
We would like as many people as possible to participate.
一人でも多くの命を救うために、募金にご協力ください。
Please donate to help save as many lives as possible.
A fixed expression composed of 一人 (one person) + でも (even) + 多く (many, adverbial form), literally 'even one person more', used idiomatically to mean 'as many people as possible'.