This time the post includes a few drawings done by Oda himself, entitled “Chibi Maruko-chan“. Oda explains the name in the post:
Sakura Momoko is a friend of mine so she’ll forgive me (for using this title).
Eiichiro Oda used this title because “Lil’ Maruko” can also be transcribed as “Lil’ Marco” (Maruko is the way you write both the Japanese name Maruko, and the Whitebeard Pirate’s Marco’s name). Because they are homophones (and we all know how much Oda loves puns like this), Oda drew a small Marco in Chibi Maruko-chan’s clothes and with her hairstyle, so be sure to check it out on the website…if you dare!

One of the things mentioned by Oda is Mr. Children. Mr. Children is a music artist that Oda seems to like a lot, and has mentioned in his Weekly Shônen Jump author comments in the past such as here, here, here and here. He was also the artist who performed the main theme song for One Piece Film: Strong World.
Other than the reappearance of “Chibi Marco-chan” from Oda’s second post, Oda also makes another pun here using the names of One Piece‘s Nami and Sazae-san‘s Namihei.
Namihei’s “hei” is pronounced just like the english “Hey” and let’s just say that you should keep this image in mind when looking at Oda’s scribble yourself, which is viewable on the official website once you’ve registered for a free account.

First of all there’s the main “storyline” of the entire drawing. It’s basically a reference to the first chapter of One Piece, but instead of Shanks handing Luffy the Straw Hat, this time it’s Chibi Marco-chan handing Luffy that which represents his chibi-Maruko-ness. Be sure to read the the other three previous posts made by Oda to understand what’s going on if you haven’t.

Second of all, there’s a small note saying “Roundbeard.” The word Maruko (from Chibi Maruko-chan) was changed to Maruhige, with Maru by itself meaning Round in Japanese and hige meaning beard. In other words, Oda’s still enjoying the Chibi Maruko-chan puns.