When we heard that VTuber Suisei Hoshimachi and virtual idol Hatsune Miku would team up for a ceremonial first pitch at a professional baseball game, many of us wanted to know exactly how this collaboration would work—who's actually throwing the ball, how Miku will appear, and what the whole event will look like. On July 20, 2026, both stars are scheduled to appear together at ZOZO Marine Stadium in Chiba before the Lotte Marines face the SoftBank Hawks, and we now have the full picture of what fans attending or watching can expect.
The event is part of Lotte's summer promotion called "Cold and Blue, Summer Has Come. Coolish & Sou DAY" (冷たくて青い、夏が来た。クーリッシュ＆爽DAY), tying in two of the company's ice cream brands with a pair of blue-themed virtual stars who've been featured together in recent TV commercials. Here's everything we know about how the ceremony will unfold, who does what, and why this collaboration has captured so much attention.
The Quick Version
- When: July 20, 2026 (Monday, a public holiday in Japan), with the ceremonial pitch scheduled for approximately 4:40 PM and game start at 5:00 PM.
- Where: ZOZO Marine Stadium in Chiba Prefecture, home of the Chiba Lotte Marines.
- Who's pitching: Suisei Hoshimachi will perform the ceremonial first pitch from the mound; Hatsune Miku will appear on the stadium's big screen to support the ceremony.
- The matchup: Chiba Lotte Marines vs. Fukuoka SoftBank Hawks.
- Why they're there: Both are featured in Lotte's current TV commercials for Coolish and Sou ice cream, and the game is a sponsored promotional event celebrating the campaign.
Who's Actually Taking the Mound—and How Miku Will Appear
One of the biggest questions we've seen is about the logistics: how do two virtual stars participate in a physical ceremony at a baseball stadium? According to official announcements, Suisei Hoshimachi will be the one performing the ceremonial pitch itself—she'll take the mound and throw the ball. Hatsune Miku, meanwhile, is scheduled to appear via the stadium's big-screen video displays, where she'll cheer and help energize the crowd as part of the overall ceremony.
The specific technology or format for Suisei's appearance hasn't been detailed in official statements, but ceremonial first pitches featuring virtual idols and VTubers in Japan have previously used large-scale projection, holographic setups, or recorded video combined with live announcements. What's clear is that Suisei will be presented as standing on the mound for the pitch, while Miku's role is explicitly described as "supporting from the screen" rather than physically throwing.
In her official comment, Suisei expressed both excitement and a bit of disbelief: "I never imagined the day would come when I'd stand on the mound at a stadium…! I'll aim for a blazing fastball and do my best to energize the ballpark, so please cheer along with us!" The phrase "blazing fastball" (剛速球) has already become a talking point among fans, with many playfully speculating about what speed a virtual idol's pitch might register.
The Timing and Game-Day Schedule
If you're planning to attend or tune in, the ceremonial pitch is scheduled for around 4:40 PM on July 20, 2026, about twenty minutes before the official first pitch of the Marines-Hawks game at 5:00 PM. This timing is typical for Japanese professional baseball ceremonial pitches, which usually take place during pre-game festivities while the stadium is filling up and the starting lineups are being announced.
July 20, 2026, falls on a Monday and is a national holiday in Japan (Marine Day), which means the stadium is likely to draw a larger-than-usual crowd for an afternoon game. The event is billed as a "sponsored game" (冠協賛試合), meaning Lotte has purchased naming and promotional rights for that day's contest, allowing them to brand the occasion around their Coolish and Sou ice cream products—and the two virtual stars who appear in the products' current advertising campaign.
The Lotte Ice Cream Campaign Behind the Event
The July 20 appearance isn't a standalone stunt—it's the live centerpiece of a broader summer marketing campaign. Both Suisei Hoshimachi and Hatsune Miku appear together in new television commercials for Lotte's Coolish (クーリッシュ, a squeeze-tube frozen dessert) and Sou (爽, a cup ice cream), two of the company's flagship summer products. The campaign slogan, "Cold and Blue, Summer Has Come," plays on the "blue" theme both stars share: Miku's signature turquoise hair and Suisei's blue color scheme and name (her first name, Suisei, means "comet" and is associated with blue in her visual design).
The commercials reportedly feature both stars performing "Ao no Sumika" (青のすみか, "Blue Dwelling"), a song closely associated with Suisei. By bringing the campaign's two faces into a live baseball stadium—a quintessentially Japanese summer experience—Lotte is tying its brand directly to both virtual idol culture and traditional sports entertainment, appealing to fans of both.
This kind of cross-promotion between food brands, baseball, and virtual stars has become increasingly common in Japan. Professional baseball teams regularly host themed game days with anime, game, and VTuber tie-ins, and sponsors use the events to connect their products with the passions of younger, digitally native audiences who might not otherwise attend a game.
What Makes This Collaboration Noteworthy
We think there are a few reasons this particular first pitch has generated so much buzz. First, it pairs two of the most recognizable names in Japanese virtual entertainment—Hatsune Miku, the VOCALOID software icon who's been a global phenomenon since 2007, and Suisei Hoshimachi, one of the most popular VTubers under the Hololive Production banner. Miku represents the older generation of virtual idols and has long since crossed over into mainstream Japanese pop culture; Suisei represents the newer, live-streaming-driven wave of VTubers who interact with fans in real time. Seeing them share a stage (or in this case, a baseball field) is a symbolic meeting of two eras of virtual stardom.
Second, ceremonial first pitches in Japanese baseball have a special cultural weight. They're not just photo ops—they're genuine honors, typically reserved for celebrities, local heroes, athletes from other sports, or figures with a meaningful tie to the team or occasion. By inviting Suisei to perform the pitch (and featuring Miku alongside her), the Marines and Lotte are acknowledging the cultural and commercial power of virtual idols and VTubers in a very traditional, physical space.
Third, Suisei's own background adds a layer of authenticity to the event. She's known among her fans for her genuine love of video games, music, and competitive activities; she's participated in numerous charity and promotional events, and she's often described as hard-working and enthusiastic. Her comment about aiming for a "blazing fastball" fits her personality—she's likely to take the pitch seriously and put real effort into it, even if it's largely symbolic.
What People Are Saying
Fans of both Suisei and Hatsune Miku have been sharing their excitement—and their curiosity—since the announcement on July 9, 2026. Here's a snapshot of the reactions we've seen:
"I can't believe Suisei is actually throwing a first pitch at a real NPB game! I hope someone clocks the speed—剛速球 let's go!"
— Fan comment on social media
"Miku on the big screen and Suisei on the mound is the collab I didn't know I needed. This is such a smart way to do a virtual idol event at a stadium."
— Fan comment on social media
"I'm a Marines fan and I'm definitely going to this game now. The ice cream tie-in is cute and it's a holiday so I can actually make it. Hope the stadium goes wild."
— Fan comment on social media
"This feels like such a Japanese summer thing—baseball, ice cream, virtual idols. I love that this is becoming normal."
— Fan comment on social media
We've also seen plenty of lighthearted speculation about what Suisei's pitch speed might be, whether she'll wear a Marines jersey, and whether the stadium will play any of her original songs during the ceremony. The blend of genuine anticipation and playful humor is exactly what we'd expect from the overlapping fanbases of baseball, VTubers, and Vocaloid culture.
Frequently Asked Questions
When exactly is the first pitch ceremony?
The ceremonial first pitch is scheduled for approximately 4:40 PM on July 20, 2026, just before the 5:00 PM start of the Chiba Lotte Marines vs. Fukuoka SoftBank Hawks game at ZOZO Marine Stadium.
Will both Hatsune Miku and Suisei Hoshimachi throw the pitch?
No—Suisei Hoshimachi will perform the actual ceremonial pitch from the mound. Hatsune Miku will appear on the stadium's big screen to support the ceremony and help energize the crowd.
Can I watch the ceremony if I'm not at the stadium?
Specific broadcast or streaming details for the ceremony haven't been confirmed in the official announcements. Japanese professional baseball games are typically broadcast on regional sports networks and streaming services, but coverage of pre-game ceremonies can vary. We recommend checking the Pacific League's official channels and the Marines' social media closer to the date for viewing information.
Why are they doing this event together?
The event is part of a promotional campaign for Lotte's Coolish and Sou ice cream brands. Both Suisei and Hatsune Miku appear together in the current TV commercials for these products, and the July 20 game is a sponsored "Coolish & Sou DAY" tie-in to the campaign.
Is this the first time a VTuber has done a first pitch in Japanese baseball?
While virtual idols and anime characters have appeared at ceremonial pitches before, VTuber appearances at professional baseball games have become more common in recent years. Suisei's pitch is part of a growing trend of Japanese sports teams partnering with VTubers and virtual talent for promotional events, but each appearance still feels like a noteworthy crossover moment for fans.
A Summer Celebration Where Two Worlds Meet
The July 20, 2026, ceremonial first pitch at ZOZO Marine Stadium is more than just a marketing stunt—it's a carefully crafted celebration of Japanese summer culture, blending the country's love of baseball with the rising influence of virtual idols and VTubers. We'll get to see Suisei Hoshimachi step up to the mound with her trademark enthusiasm, backed by the iconic presence of Hatsune Miku on the big screen, all in front of thousands of fans and under the banner of two beloved ice cream brands.
For fans of either star, it's a rare chance to see them "perform" in a completely different context from concerts or streams. For baseball fans, it's a fun, family-friendly addition to a holiday game. And for Lotte, it's a smart way to connect traditional sports entertainment with the digital-native audiences that drive so much of Japan's youth culture.
If you're able to attend or catch the broadcast, the ceremony is scheduled to begin around 4:40 PM, and we suspect the stadium atmosphere will be electric. Whether Suisei's pitch ends up being a "blazing fastball" or a more symbolic toss, we're confident it'll be a memorable moment—and a perfect snapshot of where Japanese pop culture and sports are headed together.
