The event is on the second floor of the store, which is near Tennoji, Osaka. (map)
The room costs 1200 yen to use for the whole day.
Trial miniatures are available for free for beginners who want to try out 40k.
Space is limited, so I'll go ahead and make reservations for anyone who wants to come.
For those coming from Aichi, the most convenient route is probably to take the Kintetsu Limited service to Tsuruhashi and then ride the subway to either Tanabe or Kita-tanabe station. The store is a 5 minute walk from there.
Hopefully no one minds me spamming Osaka games in this forum once a month. Let me know if it's a problem.

Higacchi is a pretty small store, so if there's any real interest in this event, I'll look into bigger venues for the future.
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5月26日14時~22時にひがっちゲームズはウォーハンマー40,000イベントを開催します。
大阪市天王寺と近い店で、2階になります!
お部屋の料金は1200円(フリータイムで)
ウォーハンマーの初心者も大歓迎です。体験用のミニアチュアは無料で用意されます。
店は狭いので、もし興味あれば事前にポストしてください。こちらほうから予約しますね。
愛知の方ですが、鶴橋行き近鉄線は一番便利だろうな。そこから田辺または北田辺駅まで行って、店まで歩けます。