Inquiry regarding companies offering port ferry services for B2B2C exports to Japan

We are currently exporting to Japan using a B2B2C model, primarily via air freight. I am inquiring to see if port (sea) export options are also available. Our main items are Dongdaemun apparel (non-brand) and general merchandise; the transaction model is B2B, with the end customers being small road shops. If there are any companies that provide port ferry services to Japan, please leave a comment or send a direct message.